Resource Table extraction - QB64 Wiki

Resource Table extraction

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The following information was supplied by Michael Calkins in a member's request to find a way to extract icons from EXE files. There is no warranty implied and users should use the information and code at their own risk! We are not responsible for any damages!

Contents

COFF Specifications

There are 3 layers to the resource tables, Type, Name, and Language, The Microsoft PE and COFF specifications can be found here:

http://msdn.microsoft.com/en-us/windows/hardware/gg463119


Image Extraction Procedure

DIM nam AS STRING * 8 DIM fil AS STRING DIM k AS STRING DIM dw AS _UNSIGNED LONG DIM ul AS _UNSIGNED LONG DIM coff AS _UNSIGNED LONG DIM SectionTable AS _UNSIGNED LONG DIM ImageBase AS _UNSIGNED LONG DIM rsrc AS _UNSIGNED LONG DIM pe32plus AS LONG DIM w AS _UNSIGNED INTEGER DIM SizeOfOptionalHeader AS _UNSIGNED INTEGER DIM SHARED NumberOfSections AS _UNSIGNED INTEGER DIM NumberOfRvaAndSizes AS _UNSIGNED LONG CLS LINE INPUT "Name of the PE image to open? "; fil IF _FILEEXISTS(fil) = 0 THEN PRINT "File not found.": END OPEN fil FOR BINARY ACCESS READ AS 1 GET 1, 1 + 0, w IF w <> &H5A4D THEN PRINT "No MZ signature.": END GET 1, 1 + &H3C, dw coff = dw + 4 GET 1, dw + 1, dw IF dw <> &H4550& THEN PRINT "No PE signature.": END GET 1, 1 + coff + 2, NumberOfSections IF NumberOfSections = 0 THEN PRINT "No sections.": END PRINT "NumberOfSections:"; NumberOfSections DIM SHARED secsva(0 TO NumberOfSections - 1) AS _UNSIGNED LONG DIM SHARED secsfp(0 TO NumberOfSections - 1) AS _UNSIGNED LONG GET 1, 1 + coff + 16, SizeOfOptionalHeader IF SizeOfOptionalHeader = 0 THEN PRINT "No optional header.": END PRINT "SizeOfOptionalHeader:", SPACE$(4); word$(SizeOfOptionalHeader) GET 1, 1 + coff + 20, w SELECT CASE w CASE &H10B: pe32plus = 0: PRINT "PE32" CASE &H20B: pe32plus = -1: PRINT "PE32+" CASE ELSE: PRINT "Unknown Magic.": END END SELECT GET 1, 1 + coff + 20 + 28 + (-4 AND pe32plus), ImageBase PRINT "ImageBase:", "", dword$(ImageBase) GET 1, 1 + coff + 20 + 92 + (16 AND pe32plus), NumberOfRvaAndSizes IF NumberOfRvaAndSizes < 3 THEN PRINT "No resource table.": END PRINT "NumberOfRvaAndSizes:"; NumberOfRvaAndSizes GET 1, 1 + coff + 20 + 112 + (16 AND pe32plus), rsrc PRINT "Rva of resource table:", dword$(rsrc) GET 1, 1 + coff + 20 + 4 + 112 + (16 AND pe32plus), dw PRINT "Size of resource table:", dword$(dw) IF (rsrc = 0) OR (dw = 0) THEN PRINT "No resource table.": END SectionTable = coff + 20 + SizeOfOptionalHeader PRINT "section", "va", "file ptr" FOR w = 0 TO NumberOfSections - 1 GET 1, 1 + SectionTable + (40 * w), nam GET 1, 1 + SectionTable + 12 + (40 * w), ul GET 1, 1 + SectionTable + 20 + (40 * w), dw PRINT nam, dword$(ul), dword$(dw) secsva(w) = ul secsfp(w) = dw NEXT PRINT PRINT "Proceed? "; DO k = LCASE$(INKEY$) IF k = "n" THEN PRINT k: END LOOP UNTIL k = "y" PRINT k processtable rva2fp(rsrc), rva2fp(rsrc), 0 SYSTEM SUB processtable (bs AS _UNSIGNED LONG, addr AS _UNSIGNED LONG, level AS INTEGER) DIM k AS STRING DIM dw AS _UNSIGNED LONG DIM numnamest8 AS _UNSIGNED LONG DIM dat AS _UNSIGNED LONG DIM siz AS _UNSIGNED LONG DIM so AS LONG DIM sc AS LONG DIM numnames AS _UNSIGNED INTEGER DIM numids AS _UNSIGNED INTEGER DIM w AS _UNSIGNED INTEGER DIM ln AS _UNSIGNED INTEGER DIM x AS _UNSIGNED INTEGER DIM y AS _UNSIGNED INTEGER DIM b AS _UNSIGNED _BYTE GET 1, 1 + addr + 12, numnames GET 1, 1 + addr + 14, numids DIM nams(0 TO numnames + (numnames > 0)) AS STRING DIM namsrva(0 TO numnames + (numnames > 0)) AS _UNSIGNED LONG DIM ids(0 TO numids + (numids > 0)) AS _UNSIGNED LONG DIM idsrva(0 TO numids + (numids > 0)) AS _UNSIGNED LONG 'get named entries FOR x = 0 TO numnames - 1 GET 1, 1 + addr + 16 + (x * 8), dw dw = rva2fp(dw) GET 1, 1 + dw, ln FOR y = 0 TO ln - 1 GET 1, , w SELECT CASE w CASE &H20 TO &H7E: nams(x) = nams(x) + CHR$(w) CASE ELSE: nams(x) = nams(x) + CHR$(&H1A) END SELECT IF y = 68 THEN EXIT FOR NEXT GET 1, 1 + addr + 16 + 4 + (x * 8), namsrva(x) NEXT 'get numbered entries: numnamest8 = numnames * 8 FOR x = 0 TO numids - 1 GET 1, 1 + addr + 16 + numnamest8 + (x * 8), ids(x) GET 1, 1 + addr + 16 + 4 + numnamest8 + (x * 8), idsrva(x) NEXT 'display: VIEW PRINT DO CLS 0 'qb64 bug? not locating to 1,1? LOCATE 1, 1 SELECT CASE level CASE 0: PRINT "1st level - Type"; CASE 1: PRINT "2nd level - Name"; CASE 2: PRINT "3rd level - Language"; CASE ELSE: PRINT LTRIM$(STR$(level)) + "th level"; END SELECT PRINT "", "file ptr: "; dword$(addr); ". Press 'D' to dump." PRINT numnames; "names in this level, in this branch." PRINT numids; "IDs in this level, in this branch." IF (numnames OR numids) = 0 THEN IF level THEN PRINT "Press any key to go up one level." SLEEP: DO: LOOP WHILE LEN(INKEY$) EXIT SUB ELSE END END IF END IF PRINT "names are unicode. For simplicity, non ASCII chars will be shown as " + CHR$(&H1A) + "." IF level THEN PRINT "BKSP or ESC to go up one level." ELSE PRINT "BKSP or ESC to exit." END IF PRINT "UP, DOWN, PGUP, PGDN, HOME, END to navigate list." PRINT "ENTER to select." PRINT STRING$(80, &HC4); LOCATE 22, 1 PRINT STRING$(80, &HC4); sc = 0 so = 0 DO COLOR 7, 0 LOCATE 8, 1: PRINT dword$(sc) FOR x = 0 TO 11 LOCATE 10 + x, 1 IF x + so = sc THEN COLOR 15, 1 ELSE COLOR 7, 0 IF (x + so) < numnames THEN PRINT nams(x + so); SPACE$(70 - LEN(nams(x + so))); PRINT dword$(bs + (namsrva(x + so) AND &H7FFFFFFF&)); COLOR 7, 0 LOCATE 7, 18 IF namsrva(x + so) AND &H80000000~& THEN PRINT "(descend)"; ELSE PRINT "(extract)"; END IF ELSEIF (x + so) < (numnames + numids) THEN PRINT "ID: " + dword$(ids(x + so - numnames)); SPACE$(56); PRINT dword$(bs + (idsrva(x + so - numnames))); COLOR 7, 0 LOCATE 7, 18 IF idsrva(x + (so - numnames)) AND &H80000000~& THEN PRINT "(descend)"; ELSE PRINT "(extract)"; END IF ELSE PRINT SPACE$(80); END IF NEXT DO k = INKEY$ LOOP UNTIL LEN(k) SELECT CASE k CASE "d", "D" dump addr EXIT DO CASE MKI$(&H4800) 'up IF sc > 0 THEN sc = sc - 1 IF sc < so THEN so = sc END IF CASE MKI$(&H5000) 'down IF sc < (numnames + numids - 1) THEN sc = sc + 1 IF sc > (so + 11) THEN so = sc - 11 IF so > sc THEN so = 0 'unsigned END IF END IF CASE MKI$(&H4700) 'home sc = 0 so = 0 CASE MKI$(&H4F00) 'end sc = numnames + numids - 1 so = sc - 11 IF so < 0 THEN so = 0 CASE MKI$(&H4900) 'pgup sc = sc - 12 so = so - 12 IF sc < 0 THEN sc = 0 IF so < 0 THEN so = 0 CASE MKI$(&H5100) 'pgdn sc = sc + 12 IF sc > (numnames + numids - 1) THEN sc = numnames + numids - 1 so = sc - 11 IF so < 0 THEN so = 0 CASE CHR$(&H8), CHR$(&H1B) 'bksp, esc EXIT SUB CASE CHR$(&HD) 'enter IF sc < numnames THEN dw = namsrva(sc) ELSE dw = idsrva(sc - numnames) END IF IF dw AND &H80000000~& THEN 'the spec says its an rfa, but it seems to be an offset in the section/table processtable bs, bs + (dw AND &H7FFFFFFF&), level + 1 EXIT DO ELSE 'the spec says its an rfa, but it seems to be an offset in the section/table dw = bs + dw GET 1, 1 + dw, dat GET 1, 1 + 4 + dw, siz LOCATE 24, 1 PRINT dword$(siz) + " bytes."; LOCATE 23, 1 LINE INPUT "(leave blank to cancel) Output file? "; k IF LEN(k) THEN IF _FILEEXISTS(k) THEN PRINT PRINT "File already exists."; ELSE OPEN k FOR BINARY AS 2 SEEK 1, 1 + rva2fp(dat) FOR dw = 1 TO siz GET 1, , b PUT 2, , b NEXT CLOSE 2 PRINT PRINT "Done."; END IF SLEEP: DO: LOOP WHILE LEN(INKEY$) END IF EXIT DO END IF END SELECT LOOP LOOP END SUB FUNCTION word$ (w AS _UNSIGNED INTEGER) DIM t AS STRING t = LCASE$(HEX$(w)) word = "0x" + STRING$(4 - LEN(t), &H30) + t END FUNCTION FUNCTION dword$ (dw AS _UNSIGNED LONG) DIM t AS STRING t = LCASE$(HEX$(dw)) dword = "0x" + STRING$(8 - LEN(t), &H30) + t END FUNCTION FUNCTION rva2fp~& (rva AS _UNSIGNED LONG) DIM w AS _UNSIGNED INTEGER FOR w = 0 TO NumberOfSections - 1 IF rva < secsva(w) THEN EXIT FOR NEXT w = w - 1 IF w > NumberOfSections - 1 THEN PRINT dword$(rva), w: SLEEP rva2fp = rva + (secsfp(w) - secsva(w)) END FUNCTION SUB dump (addr AS _UNSIGNED LONG) DIM t AS STRING DIM dw AS _UNSIGNED LONG DIM ul AS _UNSIGNED LONG DIM b AS _UNSIGNED _BYTE VIEW PRINT ul = addr DO COLOR 7, 0 CLS 0 SEEK 1, 1 + ul FOR dw = ul TO (ul AND &HFFFFFFF0) + &H15F IF (1 + ul) > LOF(1) THEN EXIT FOR GET 1, , b IF (dw AND &HF) = 0 THEN t = LCASE$(HEX$(dw)) COLOR 7 PRINT STRING$(8 - LEN(t), &H30) + t; SPACE$(2); END IF IF (dw AND &H4) THEN COLOR 3 ELSE COLOR 2 LOCATE , 14 + ((dw AND &HF) * 3) t = LCASE$(HEX$(b)) IF b < &H10 THEN PRINT "0" + t; ELSE PRINT t; LOCATE , 65 + (dw AND &HF) SELECT CASE b CASE 7, 9 TO &HD, &H1F: PRINT "."; CASE ELSE: PRINT CHR$(b); END SELECT NEXT PRINT COLOR 7 LINE INPUT "(leave blank to cancel) Address: 0x"; t IF LTRIM$(t) = "" THEN EXIT DO ul = VAL("&h" + t + "&") AND &H7FFFFFFF LOOP END SUB

Public domain October 2011 by Michael Calkins based on the Microsoft PE and COFF spec, Revision 8.2 - September 21, 2010


If you open c:\windows\system32\shell32.dll, and save the first item (descend the first entry, then the first entry of the next level, etc), it's an .AVI file of a flashlight searching a folder. If you go down the first entry of the first level, but the last entry of the second level, it's an .AVI of a globe throwing a page at a folder. Save both files as AVI to view the video.
I wouldn't consider the program finished. There's some double checking, tweaking, and optimizing that could be done. For example, the dump sub could probably use an extra variable, and could probably use some increased functionality. I wrote it to help me debug the part that reads the resource tables. As I say in the comments, the part that gives the address of either the "leaf" or the next table lower seems to be relative to the start of the main table or section, not an actual RVA.
With things like:

GET 1, 1 + coff + 20 + 28 + (-4 AND pe32plus), ImageBase

That could obviously be optimized by combining the 1 + 20 + 28. By leaving it uncombined, though, it documents itself better in terms of helping the human reader match it up with the specification. 1 because QBASIC's GET/PUT/SEEK idiotically starts at 1 instead of 0. Coff because we want an offset from the start of the coff header, 20 to skip the 20 byte coff main header, 28 because that's the offset of ImageBase in the optional header, and (-4 AND pe32plus) because the offset is 24 if the Magic is PE32+. Either QB64 or GCC will probably optimize it anyway, I would think.
In the Section table, the name of the field is VirtualAddress, but the description seems to say that it is an RVA. My program assumes that it is an RVA. The rva2fp function finds which section a given RVA is in, and then uses the difference between the RVA and the file pointer for that section to turn the given RVA into a file pointer.
Regards, Michael Calkins


(Return to Table of Contents)

Revision 2

I've made a few minor changes to the program. It will show you the first 400 bytes when you choose to export the data. Also, by moving the initialization of sc and so outside the loop, you will now come back to the correct entry upon ascending a level. I experimented with code to PSET the data, but it is commented out.

'october 2011, michael calkins 'my code is public domain, but it's based on Microsoft's spec, so I'm not sure 'what kind of patents or copyrights apply. 'based on the Microsoft PE and COFF spec, Revision 8.2 - September 21, 2010 'http://msdn.microsoft.com/en-us/windows/hardware/gg463119.aspx DIM nam AS STRING * 8 DIM fil AS STRING DIM k AS STRING DIM dw AS _UNSIGNED LONG DIM ul AS _UNSIGNED LONG DIM coff AS _UNSIGNED LONG DIM SectionTable AS _UNSIGNED LONG DIM ImageBase AS _UNSIGNED LONG DIM rsrc AS _UNSIGNED LONG DIM pe32plus AS LONG DIM w AS _UNSIGNED INTEGER DIM SizeOfOptionalHeader AS _UNSIGNED INTEGER DIM SHARED NumberOfSections AS _UNSIGNED INTEGER DIM NumberOfRvaAndSizes AS _UNSIGNED LONG CLS LINE INPUT "Name of the PE image to open? "; fil IF _FILEEXISTS(fil) = 0 THEN PRINT "File not found.": END OPEN fil FOR BINARY ACCESS READ AS 1 GET 1, 1 + 0, w IF w <> &H5A4D THEN PRINT "No MZ signature.": END GET 1, 1 + &H3C, dw coff = dw + 4 GET 1, dw + 1, dw IF dw <> &H4550& THEN PRINT "No PE signature.": END GET 1, 1 + coff + 2, NumberOfSections IF NumberOfSections = 0 THEN PRINT "No sections.": END PRINT "NumberOfSections:"; NumberOfSections DIM SHARED secsva(0 TO NumberOfSections - 1) AS _UNSIGNED LONG DIM SHARED secsfp(0 TO NumberOfSections - 1) AS _UNSIGNED LONG GET 1, 1 + coff + 16, SizeOfOptionalHeader IF SizeOfOptionalHeader = 0 THEN PRINT "No optional header.": END PRINT "SizeOfOptionalHeader:", SPACE$(4); word$(SizeOfOptionalHeader) GET 1, 1 + coff + 20, w SELECT CASE w CASE &H10B: pe32plus = 0: PRINT "PE32" CASE &H20B: pe32plus = -1: PRINT "PE32+" CASE ELSE: PRINT "Unknown Magic.": END END SELECT GET 1, 1 + coff + 20 + 28 + (-4 AND pe32plus), ImageBase PRINT "ImageBase:", "", dword$(ImageBase) GET 1, 1 + coff + 20 + 92 + (16 AND pe32plus), NumberOfRvaAndSizes IF NumberOfRvaAndSizes < 3 THEN PRINT "No resource table.": END PRINT "NumberOfRvaAndSizes:"; NumberOfRvaAndSizes GET 1, 1 + coff + 20 + 112 + (16 AND pe32plus), rsrc PRINT "Rva of resource table:", dword$(rsrc) GET 1, 1 + coff + 20 + 4 + 112 + (16 AND pe32plus), dw PRINT "Size of resource table:", dword$(dw) IF (rsrc = 0) OR (dw = 0) THEN PRINT "No resource table.": END SectionTable = coff + 20 + SizeOfOptionalHeader PRINT "section", "va", "file ptr" FOR w = 0 TO NumberOfSections - 1 GET 1, 1 + SectionTable + (40 * w), nam GET 1, 1 + SectionTable + 12 + (40 * w), ul GET 1, 1 + SectionTable + 20 + (40 * w), dw PRINT nam, dword$(ul), dword$(dw) secsva(w) = ul secsfp(w) = dw NEXT PRINT PRINT "Proceed? "; DO k = LCASE$(INKEY$) IF k = "n" THEN PRINT k: END LOOP UNTIL k = "y" PRINT k processtable rva2fp(rsrc), rva2fp(rsrc), 0 SYSTEM SUB processtable (bs AS _UNSIGNED LONG, addr AS _UNSIGNED LONG, level AS INTEGER) DIM k AS STRING DIM dw AS _UNSIGNED LONG DIM numnamest8 AS _UNSIGNED LONG DIM dat AS _UNSIGNED LONG DIM siz AS _UNSIGNED LONG DIM so AS LONG DIM sc AS LONG DIM numnames AS _UNSIGNED INTEGER DIM numids AS _UNSIGNED INTEGER DIM w AS _UNSIGNED INTEGER DIM ln AS _UNSIGNED INTEGER DIM x AS _UNSIGNED INTEGER DIM y AS _UNSIGNED INTEGER DIM b AS _UNSIGNED _BYTE GET 1, 1 + addr + 12, numnames GET 1, 1 + addr + 14, numids DIM nams(0 TO numnames + (numnames > 0)) AS STRING DIM namsrva(0 TO numnames + (numnames > 0)) AS _UNSIGNED LONG DIM ids(0 TO numids + (numids > 0)) AS _UNSIGNED LONG DIM idsrva(0 TO numids + (numids > 0)) AS _UNSIGNED LONG 'get named entries FOR x = 0 TO numnames - 1 GET 1, 1 + addr + 16 + (x * 8), dw dw = rva2fp(dw) GET 1, 1 + dw, ln FOR y = 0 TO ln - 1 GET 1, , w SELECT CASE w CASE &H20 TO &H7E: nams(x) = nams(x) + CHR$(w) CASE ELSE: nams(x) = nams(x) + CHR$(&H1A) END SELECT IF y = 68 THEN EXIT FOR NEXT GET 1, 1 + addr + 16 + 4 + (x * 8), namsrva(x) NEXT 'get numbered entries: numnamest8 = numnames * 8 FOR x = 0 TO numids - 1 GET 1, 1 + addr + 16 + numnamest8 + (x * 8), ids(x) GET 1, 1 + addr + 16 + 4 + numnamest8 + (x * 8), idsrva(x) NEXT 'display: VIEW PRINT sc = 0 so = 0 DO CLS 0 'qb64 bug? not locating to 1,1? LOCATE 1, 1 SELECT CASE level CASE 0: PRINT "1st level - Type"; CASE 1: PRINT "2nd level - Name"; CASE 2: PRINT "3rd level - Language"; CASE ELSE: PRINT LTRIM$(STR$(level)) + "th level"; END SELECT PRINT "", "file ptr: "; dword$(addr); ". Press 'D' to dump." PRINT numnames; "names in this level, in this branch." PRINT numids; "IDs in this level, in this branch." IF (numnames OR numids) = 0 THEN IF level THEN PRINT "Press any key to go up one level." SLEEP: DO: LOOP WHILE LEN(INKEY$) EXIT SUB ELSE END END IF END IF PRINT "names are unicode. For simplicity, non ASCII chars will be shown as " + CHR$(&H1A) + "." IF level THEN PRINT "BKSP or ESC to go up one level." ELSE PRINT "BKSP or ESC to exit." END IF PRINT "UP, DOWN, PGUP, PGDN, HOME, END to navigate list." PRINT "ENTER to select." PRINT STRING$(80, &HC4); LOCATE 22, 1 PRINT STRING$(80, &HC4); DO COLOR 7, 0 LOCATE 8, 1: PRINT dword$(sc) FOR x = 0 TO 11 LOCATE 10 + x, 1 IF x + so = sc THEN COLOR 15, 1 ELSE COLOR 7, 0 IF (x + so) < numnames THEN PRINT nams(x + so); SPACE$(70 - LEN(nams(x + so))); PRINT dword$(bs + (namsrva(x + so) AND &H7FFFFFFF&)); COLOR 7, 0 LOCATE 7, 18 IF namsrva(x + so) AND &H80000000~& THEN PRINT "(descend)"; ELSE PRINT "(extract)"; END IF ELSEIF (x + so) < (numnames + numids) THEN PRINT "ID: " + dword$(ids(x + so - numnames)); SPACE$(56); PRINT dword$(bs + (idsrva(x + so - numnames))); COLOR 7, 0 LOCATE 7, 18 IF idsrva(x + (so - numnames)) AND &H80000000~& THEN PRINT "(descend)"; ELSE PRINT "(extract)"; END IF ELSE PRINT SPACE$(80); END IF NEXT DO k = INKEY$ LOOP UNTIL LEN(k) SELECT CASE k CASE "d", "D" dump addr EXIT DO CASE MKI$(&H4800) 'up IF sc > 0 THEN sc = sc - 1 IF sc < so THEN so = sc END IF CASE MKI$(&H5000) 'down IF sc < (numnames + numids - 1) THEN sc = sc + 1 IF sc > (so + 11) THEN so = sc - 11 IF so > sc THEN so = 0 'unsigned END IF END IF CASE MKI$(&H4700) 'home sc = 0 so = 0 CASE MKI$(&H4F00) 'end sc = numnames + numids - 1 so = sc - 11 IF so < 0 THEN so = 0 CASE MKI$(&H4900) 'pgup sc = sc - 12 so = so - 12 IF sc < 0 THEN sc = 0 IF so < 0 THEN so = 0 CASE MKI$(&H5100) 'pgdn sc = sc + 12 IF sc > (numnames + numids - 1) THEN sc = numnames + numids - 1 so = sc - 11 IF so < 0 THEN so = 0 CASE CHR$(&H8), CHR$(&H1B) 'bksp, esc EXIT SUB CASE CHR$(&HD) 'enter IF sc < numnames THEN dw = namsrva(sc) ELSE dw = idsrva(sc - numnames) END IF IF dw AND &H80000000~& THEN 'the spec says its an rva, but it seems to be an offset in the section/table processtable bs, bs + (dw AND &H7FFFFFFF&), level + 1 EXIT DO ELSE 'the spec says its an rva, but it seems to be an offset in the section/table dw = bs + dw GET 1, 1 + dw, dat GET 1, 1 + 4 + dw, siz CLS LOCATE 1, 1 'qb64 seems to default to line 2 SEEK 1, 1 + rva2fp(dat) FOR dw = 1 TO siz IF dw > 400 THEN EXIT FOR GET 1, , b SELECT CASE b CASE 7, 9 TO &HD, &H1F: PRINT "."; CASE ELSE: PRINT CHR$(b); END SELECT NEXT LOCATE 24, 1 PRINT dword$(siz) + " bytes."; LOCATE 23, 1 LINE INPUT "(leave blank to cancel) Output file? "; k ' IF k = "v" THEN ' INPUT "width in pixels"; w ' SCREEN 13 ' SEEK 1, 1 + rva2fp(dat) ' FOR dw = 1 TO siz ' IF dw \ w >= 200 THEN EXIT FOR ' GET 1, , b ' PSET (dw MOD w, dw \ w), b ' NEXT ' SLEEP: DO: LOOP WHILE LEN(INKEY$) ' SCREEN 0 ' WIDTH 80, 25 ' VIEW PRINT ' CLS ' END IF IF LEN(k) THEN IF _FILEEXISTS(k) THEN PRINT PRINT "File already exists."; ELSE OPEN k FOR BINARY AS 2 SEEK 1, 1 + rva2fp(dat) FOR dw = 1 TO siz GET 1, , b PUT 2, , b NEXT CLOSE 2 PRINT PRINT "Done."; END IF SLEEP: DO: LOOP WHILE LEN(INKEY$) END IF EXIT DO END IF END SELECT LOOP LOOP END SUB FUNCTION word$ (w AS _UNSIGNED INTEGER) DIM t AS STRING t = LCASE$(HEX$(w)) word = "0x" + STRING$(4 - LEN(t), &H30) + t END FUNCTION FUNCTION dword$ (dw AS _UNSIGNED LONG) DIM t AS STRING t = LCASE$(HEX$(dw)) dword = "0x" + STRING$(8 - LEN(t), &H30) + t END FUNCTION FUNCTION rva2fp~& (rva AS _UNSIGNED LONG) DIM w AS _UNSIGNED INTEGER FOR w = 0 TO NumberOfSections - 1 IF rva < secsva(w) THEN EXIT FOR NEXT w = w - 1 IF w > NumberOfSections - 1 THEN PRINT dword$(rva), w: SLEEP rva2fp = rva + (secsfp(w) - secsva(w)) END FUNCTION SUB dump (addr AS _UNSIGNED LONG) DIM t AS STRING DIM dw AS _UNSIGNED LONG DIM ul AS _UNSIGNED LONG DIM b AS _UNSIGNED _BYTE VIEW PRINT ul = addr DO COLOR 7, 0 CLS 0 SEEK 1, 1 + ul FOR dw = ul TO (ul AND &HFFFFFFF0) + &H15F IF (1 + ul) > LOF(1) THEN EXIT FOR GET 1, , b IF (dw AND &HF) = 0 THEN t = LCASE$(HEX$(dw)) COLOR 7 PRINT STRING$(8 - LEN(t), &H30) + t; SPACE$(2); END IF IF (dw AND &H4) THEN COLOR 3 ELSE COLOR 2 LOCATE , 14 + ((dw AND &HF) * 3) t = LCASE$(HEX$(b)) IF b < &H10 THEN PRINT "0" + t; ELSE PRINT t; LOCATE , 65 + (dw AND &HF) SELECT CASE b CASE 7, 9 TO &HD, &H1F: PRINT "."; CASE ELSE: PRINT CHR$(b); END SELECT NEXT PRINT COLOR 7 LINE INPUT "(leave blank to cancel) Address: 0x"; t IF LTRIM$(t) = "" THEN EXIT DO ul = VAL("&h" + t + "&") AND &H7FFFFFFF LOOP END SUB

The .ICO format:
http://en.wikipedia.org/wiki/ICO_%28file_format%29

http://www.iconolog.org/info/icoFormat.html

http://en.wikipedia.org/wiki/BMP_file_format


Note that the BMP file header is excluded, but the DIB information header is included. My observations from using Resource Hacker on c:\windows\notepad.exe:
I've downloaded Resource Hacker. Note that if you export the first icon of \windows\notepad.exe as a binary file, it is identical to the file exported from my program (verifiable with fc /b). However, if you export it as an icon file, Resource Hacker adds 22 bytes to the beginning of it, a 6 byte ICONDIR structure, and a 16 byte ICONDIRENTRY structure. Resource Hacker is getting this information from the Icon Group resource.
If you export the Icon Group resource as a binary file, you will see that it starts with an ICONDIR structure specifying 9 images. It is followed by an array of 9 structures, 14 bytes each. The first 12 bytes are the same as an ICONDIRENTRY structure. (with a 2x Height difference). The last element, which would be a dword offset in a ICONDIRENTRY structure is instead a word index identifying the particular icon.
You can see what I mean: Use Resource Hacker to export the Icon Group as a binary file, named rhig.bin:

edit /78 rhig.bin

Delete the first 6 bytes, and save it as rhigmod.bin.

edit /14 rhigmod.bin

and you can clearly see the array.
Note that, according to:
http://www.iconolog.org/info/icoFormat.html
There is supposed to be a 2x Height difference between the ICONDIRENTRY structure in the icon file, and the DIB header within the icon file, with the DIB header having 2x the Height. However, when Resource Hacker exported the Icon file, it put 2x the Height in the ICONDIRENTRY structure also, doubling it from the Icon Group data. Icons seem to be Type ID 0x3, and Icon Groups seem to be Type ID 0xe. This seems consistent with:
http://msdn.microsoft.com/en-us/library/ms648009(v=VS.85).aspx
I'll probably write some code in the next day or two to automate the process of extracting icons from a PE. My observations would need to be double checked before being relied upon. (as always)
Regards, Michael Calkins


(Return to Table of Contents)

Revision 3

The addresses of the strings were also offsets from the start of the main table. So now, it should correctly display the names of named entries. It now displays the names of known Type IDs. It can now accept the PE file name as a command line parameter, so that you can press up, enter, from the cmd prompt to restart it without having to type the name again.
I've moved the first horizontal line down 1 line. There is a minor optimization in that there is one less call to rva2fp.

'revision 20120316, michael calkins 'october 2011, michael calkins 'my code is public domain, but it's based on Microsoft's spec, so I'm not sure 'what kind of patents or copyrights apply. 'based on the Microsoft PE and COFF spec, Revision 8.2 - September 21, 2010 'http://msdn.microsoft.com/en-us/windows/hardware/gg463119.aspx 'bug fixes on 2012 03 16: ' changed NumberOfRvaAndSizes to an _unsigned long ' added _CONTROLCHR OFF to the dump sub, and replaced the select case DIM nam AS STRING * 8 DIM fil AS STRING DIM k AS STRING DIM dw AS _UNSIGNED LONG DIM ul AS _UNSIGNED LONG DIM coff AS _UNSIGNED LONG DIM SectionTable AS _UNSIGNED LONG DIM ImageBase AS _UNSIGNED LONG DIM rsrc AS _UNSIGNED LONG DIM pe32plus AS LONG DIM w AS _UNSIGNED INTEGER DIM SizeOfOptionalHeader AS _UNSIGNED INTEGER DIM SHARED NumberOfSections AS _UNSIGNED INTEGER DIM NumberOfRvaAndSizes AS _UNSIGNED LONG CLS fil = COMMAND$ IF LEN(fil) = 0 THEN LINE INPUT "Name of the PE image to open? "; fil IF _FILEEXISTS(fil) = 0 THEN PRINT "File not found.": END OPEN fil FOR BINARY ACCESS READ AS 1 GET 1, 1 + 0, w IF w <> &H5A4D THEN PRINT "No MZ signature.": END GET 1, 1 + &H3C, dw coff = dw + 4 GET 1, dw + 1, dw IF dw <> &H4550& THEN PRINT "No PE signature.": END GET 1, 1 + coff + 2, NumberOfSections IF NumberOfSections = 0 THEN PRINT "No sections.": END PRINT "NumberOfSections:"; NumberOfSections DIM SHARED secsva(0 TO NumberOfSections - 1) AS _UNSIGNED LONG DIM SHARED secsfp(0 TO NumberOfSections - 1) AS _UNSIGNED LONG GET 1, 1 + coff + 16, SizeOfOptionalHeader IF SizeOfOptionalHeader = 0 THEN PRINT "No optional header.": END PRINT "SizeOfOptionalHeader:", SPACE$(4); word$(SizeOfOptionalHeader) GET 1, 1 + coff + 20, w SELECT CASE w CASE &H10B: pe32plus = 0: PRINT "PE32" CASE &H20B: pe32plus = -1: PRINT "PE32+" CASE ELSE: PRINT "Unknown Magic.": END END SELECT GET 1, 1 + coff + 20 + 28 + (-4 AND pe32plus), ImageBase PRINT "ImageBase:", "", dword$(ImageBase) GET 1, 1 + coff + 20 + 92 + (16 AND pe32plus), NumberOfRvaAndSizes IF NumberOfRvaAndSizes < 3 THEN PRINT "No resource table.": END PRINT "NumberOfRvaAndSizes:"; NumberOfRvaAndSizes GET 1, 1 + coff + 20 + 112 + (16 AND pe32plus), rsrc PRINT "Rva of resource table:", dword$(rsrc) GET 1, 1 + coff + 20 + 4 + 112 + (16 AND pe32plus), dw PRINT "Size of resource table:", dword$(dw) IF (rsrc = 0) OR (dw = 0) THEN PRINT "No resource table.": END SectionTable = coff + 20 + SizeOfOptionalHeader PRINT "section", "va", "file ptr" FOR w = 0 TO NumberOfSections - 1 GET 1, 1 + SectionTable + (40 * w), nam GET 1, 1 + SectionTable + 12 + (40 * w), ul GET 1, 1 + SectionTable + 20 + (40 * w), dw PRINT nam, dword$(ul), dword$(dw) secsva(w) = ul secsfp(w) = dw NEXT PRINT PRINT "Proceed? "; DO k = LCASE$(INKEY$) IF k = "n" THEN PRINT k: END LOOP UNTIL k = "y" PRINT k dw = rva2fp(rsrc) processtable dw, dw, 0 SYSTEM SUB processtable (bs AS _UNSIGNED LONG, addr AS _UNSIGNED LONG, level AS INTEGER) DIM k AS STRING DIM dw AS _UNSIGNED LONG DIM numnamest8 AS _UNSIGNED LONG DIM dat AS _UNSIGNED LONG DIM siz AS _UNSIGNED LONG DIM so AS LONG DIM sc AS LONG DIM numnames AS _UNSIGNED INTEGER DIM numids AS _UNSIGNED INTEGER DIM w AS _UNSIGNED INTEGER DIM ln AS _UNSIGNED INTEGER DIM x AS _UNSIGNED INTEGER DIM y AS _UNSIGNED INTEGER DIM b AS _UNSIGNED _BYTE GET 1, 1 + addr + 12, numnames GET 1, 1 + addr + 14, numids DIM nams(0 TO numnames + (numnames > 0)) AS STRING DIM namsrva(0 TO numnames + (numnames > 0)) AS _UNSIGNED LONG DIM ids(0 TO numids + (numids > 0)) AS _UNSIGNED LONG DIM idsrva(0 TO numids + (numids > 0)) AS _UNSIGNED LONG 'get named entries FOR x = 0 TO numnames - 1 GET 1, 1 + addr + 16 + (x * 8), dw 'the spec says its an rva, but it seems to be an offset in the section/table 'low 31 bits are an offset from bs GET 1, 1 + bs + (dw AND &H7FFFFFFF), ln FOR y = 0 TO ln - 1 GET 1, , w SELECT CASE w CASE &H20 TO &H7E: nams(x) = nams(x) + CHR$(w) CASE ELSE: nams(x) = nams(x) + CHR$(&H1A) END SELECT IF y = 68 THEN EXIT FOR NEXT GET 1, 1 + addr + 16 + 4 + (x * 8), namsrva(x) NEXT 'get numbered entries: numnamest8 = numnames * 8 FOR x = 0 TO numids - 1 GET 1, 1 + addr + 16 + numnamest8 + (x * 8), ids(x) GET 1, 1 + addr + 16 + 4 + numnamest8 + (x * 8), idsrva(x) NEXT 'display: VIEW PRINT sc = 0 so = 0 DO CLS 0 'qb64 bug? not locating to 1,1? LOCATE 1, 1 SELECT CASE level CASE 0: PRINT "1st level - Type"; CASE 1: PRINT "2nd level - Name"; CASE 2: PRINT "3rd level - Language"; CASE ELSE: PRINT LTRIM$(STR$(level)) + "th level"; END SELECT PRINT "", "file ptr: "; dword$(addr); ". Press 'D' to dump." PRINT numnames; "names in this level, in this branch." PRINT numids; "IDs in this level, in this branch." IF (numnames OR numids) = 0 THEN IF level THEN PRINT "Press any key to go up one level." SLEEP: DO: LOOP WHILE LEN(INKEY$) EXIT SUB ELSE END END IF END IF PRINT "names are unicode. For simplicity, non ASCII chars will be shown as " + CHR$(&H1A) + "." IF level THEN PRINT "BKSP or ESC to go up one level." ELSE PRINT "BKSP or ESC to exit." END IF PRINT "UP, DOWN, PGUP, PGDN, HOME, END to navigate list." PRINT "ENTER to select." LOCATE 9, 1 PRINT STRING$(80, &HC4); LOCATE 22, 1 PRINT STRING$(80, &HC4); DO COLOR 7, 0 LOCATE 8, 1: PRINT dword$(sc) FOR x = 0 TO 11 LOCATE 10 + x, 1 IF x + so = sc THEN COLOR 15, 1 ELSE COLOR 7, 0 IF (x + so) < numnames THEN PRINT nams(x + so); SPACE$(70 - LEN(nams(x + so))); PRINT dword$(bs + (namsrva(x + so) AND &H7FFFFFFF&)); COLOR 7, 0 LOCATE 7, 18 IF namsrva(x + so) AND &H80000000~& THEN PRINT "(descend)"; ELSE PRINT "(extract)"; END IF ELSEIF (x + so) < (numnames + numids) THEN PRINT "ID: " + dword$(ids(x + so - numnames)); IF level = 0 THEN PRINT " (RT_"; 'derived from: ' http://msdn.microsoft.com/en-us/library/ms648009(v=VS.85).aspx SELECT CASE ids(x + so - numnames) CASE 9: PRINT "ACCELERATOR"; CASE 21: PRINT "ANICURSOR"; CASE 22: PRINT "ANIICON"; CASE 2: PRINT "BITMAP"; CASE 1: PRINT "CURSOR"; CASE 5: PRINT "DIALOG"; CASE 17: PRINT "DLGINCLUDE"; CASE 8: PRINT "FONT"; CASE 7: PRINT "FONTDIR"; CASE 12: PRINT "GROUP_CURSOR"; CASE 14: PRINT "GROUP_ICON"; CASE 23: PRINT "HTML"; CASE 3: PRINT "ICON"; CASE 24: PRINT "MANIFEST"; CASE 4: PRINT "MENU"; CASE 11: PRINT "MESSAGETABLE"; CASE 19: PRINT "PLUGPLAY"; CASE 10: PRINT "RCDATA"; CASE 6: PRINT "STRING"; CASE 16: PRINT "VERSION"; CASE 20: PRINT "VXD"; END SELECT PRINT ")"; END IF PRINT SPACE$(71 - POS(0)); PRINT dword$(bs + (idsrva(x + so - numnames))); COLOR 7, 0 LOCATE 7, 18 IF idsrva(x + (so - numnames)) AND &H80000000~& THEN PRINT "(descend)"; ELSE PRINT "(extract)"; END IF ELSE PRINT SPACE$(80); END IF NEXT DO k = INKEY$ LOOP UNTIL LEN(k) SELECT CASE k CASE "d", "D" dump addr EXIT DO CASE MKI$(&H4800) 'up IF sc > 0 THEN sc = sc - 1 IF sc < so THEN so = sc END IF CASE MKI$(&H5000) 'down IF sc < (numnames + numids - 1) THEN sc = sc + 1 IF sc > (so + 11) THEN so = sc - 11 IF so > sc THEN so = 0 'unsigned END IF END IF CASE MKI$(&H4700) 'home sc = 0 so = 0 CASE MKI$(&H4F00) 'end sc = numnames + numids - 1 so = sc - 11 IF so < 0 THEN so = 0 CASE MKI$(&H4900) 'pgup sc = sc - 12 so = so - 12 IF sc < 0 THEN sc = 0 IF so < 0 THEN so = 0 CASE MKI$(&H5100) 'pgdn sc = sc + 12 IF sc > (numnames + numids - 1) THEN sc = numnames + numids - 1 so = sc - 11 IF so < 0 THEN so = 0 CASE CHR$(&H8), CHR$(&H1B) 'bksp, esc EXIT SUB CASE CHR$(&HD) 'enter IF sc < numnames THEN dw = namsrva(sc) ELSE dw = idsrva(sc - numnames) END IF IF dw AND &H80000000~& THEN 'the spec says its an rva, but it seems to be an offset in the section/table processtable bs, bs + (dw AND &H7FFFFFFF&), level + 1 EXIT DO ELSE 'the spec says its an rva, but it seems to be an offset in the section/table dw = bs + dw GET 1, 1 + dw, dat GET 1, 1 + 4 + dw, siz CLS LOCATE 1, 1 'qb64 seems to default to line 2 SEEK 1, 1 + rva2fp(dat) FOR dw = 1 TO siz IF dw > 400 THEN EXIT FOR GET 1, , b SELECT CASE b CASE 7, 9 TO &HD, &H1F: PRINT "."; CASE ELSE: PRINT CHR$(b); END SELECT NEXT LOCATE 24, 1 PRINT dword$(siz) + " bytes."; LOCATE 23, 1 LINE INPUT "(leave blank to cancel) Output file? "; k IF LEN(k) THEN IF _FILEEXISTS(k) THEN PRINT PRINT "File already exists."; ELSE OPEN k FOR BINARY AS 2 SEEK 1, 1 + rva2fp(dat) FOR dw = 1 TO siz GET 1, , b PUT 2, , b NEXT CLOSE 2 PRINT PRINT "Done."; END IF SLEEP: DO: LOOP WHILE LEN(INKEY$) END IF EXIT DO END IF END SELECT LOOP LOOP END SUB FUNCTION word$ (w AS _UNSIGNED INTEGER) DIM t AS STRING t = LCASE$(HEX$(w)) word = "0x" + STRING$(4 - LEN(t), &H30) + t END FUNCTION FUNCTION dword$ (dw AS _UNSIGNED LONG) DIM t AS STRING t = LCASE$(HEX$(dw)) dword = "0x" + STRING$(8 - LEN(t), &H30) + t END FUNCTION FUNCTION rva2fp~& (rva AS _UNSIGNED LONG) DIM w AS _UNSIGNED INTEGER FOR w = 0 TO NumberOfSections - 1 IF rva < secsva(w) THEN EXIT FOR NEXT w = w - 1 IF w > NumberOfSections - 1 THEN PRINT dword$(rva), w: SLEEP rva2fp = rva + (secsfp(w) - secsva(w)) END FUNCTION SUB dump (addr AS _UNSIGNED LONG) DIM t AS STRING DIM dw AS _UNSIGNED LONG DIM ul AS _UNSIGNED LONG DIM b AS _UNSIGNED _BYTE _CONTROLCHR OFF VIEW PRINT ul = addr DO COLOR 7, 0 CLS 0 SEEK 1, 1 + ul FOR dw = ul TO (ul AND &HFFFFFFF0) + &H15F IF (1 + ul) > LOF(1) THEN EXIT FOR GET 1, , b IF (dw AND &HF) = 0 THEN t = LCASE$(HEX$(dw)) COLOR 7 PRINT STRING$(8 - LEN(t), &H30) + t; SPACE$(2); END IF IF (dw AND &H4) THEN COLOR 3 ELSE COLOR 2 LOCATE , 14 + ((dw AND &HF) * 3) t = LCASE$(HEX$(b)) IF b < &H10 THEN PRINT "0" + t; ELSE PRINT t; LOCATE , 65 + (dw AND &HF) PRINT CHR$(b); NEXT PRINT COLOR 7 LINE INPUT "(leave blank to cancel) Address: 0x"; t IF LTRIM$(t) = "" THEN EXIT DO ul = VAL("&h" + t + "&") AND &H7FFFFFFF LOOP END SUB


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Extract Icon

Here is a program to extract an icon from a PE file. You specify the PE file, the index of the icon group (the first is 0), the maximum width and colors, and the output file. It will try to find the best matching icon, and extract the icon from the first language. I had earlier said that Resource Hacker gets the information for the ICO header from the icon group data. It could, but it could also get the data from the DIB header. Resource Hacker seems to use several fields that are reserved according to:
http://www.iconolog.org/info/icoFormat.html
I use some of those fields in the icon group data to select the best icon from the group.
Notepad.exe has 1 group of 9 icons: 48, 32, and 16 pixels; 32, 8, and 4 bpp each. The 4 bpp icons are the old fashioned ones. :-) I like both the old and new. C:\Windows\System32\shell32.dll and pifmgr.dll have numerous icons.

'revision date, last person to revise 'revision 20111101, michael calkins '(derivitives may list sources of derivision) 'october 2011, michael calkins 'my code is public domain, but it's based on Microsoft's spec, so I'm not sure 'what kind of patents or copyrights apply. 'based on the Microsoft PE and COFF spec, Revision 8.2 - September 21, 2010 '[http://msdn.microsoft.com/en-us/windows/hardware/gg463119.aspx] DIM fil AS STRING DIM n AS LONG DIM gi AS _UNSIGNED LONG DIM wi AS LONG DIM bpp AS LONG fil = "\windows\notepad.exe" IF LEN(fil) = 0 THEN LINE INPUT fil gi = 0 'first icon group is normally 0 in most EXE or DLL files wi = 32 '16 to 256 max width '<<<<<<<<<<< change settings for other sizes bpp = 8 '4 to 32 bit max color '<<<<<<<<<<< 4 bit may use older style images mode = 0 ' 0 = icon, 1 = bitmap del$ = "delme.ico" 'change file extension to .BMP with mode 1 for bitmaps IF _FILEEXISTS(del$) THEN KILL del$ 'this file will be erased. n = geticon(fil, del$, gi, wi, bpp, mode) IF n THEN PRINT "error:"; n, geticonerror(n) END ELSE SHELL _DONTWAIT "mspaint " + del$ END IF SYSTEM ' --------------------------------------------------- FUNCTION geticon& (fin AS STRING, fout AS STRING, gi AS _UNSIGNED LONG, wi AS _UNSIGNED LONG, co AS _UNSIGNED LONG, m AS _UNSIGNED LONG) 'function extracts the best matching icon from a specified icon group from 'a specified PE image, and saves it to a specified file in a specified format. 'extracts the first language. 'fil = input file name 'fout = output file name 'gi = the number of the Icon Group (0 is first) 'wi = the preferred width (width is given priority over color) 'co = the preferred bits per pixel 'm = mode (0 for .ico, nonzero for .bmp) 'returns 0 for success, nonzero for error. DIM dw AS _UNSIGNED LONG DIM coff AS _UNSIGNED LONG DIM SectionTable AS _UNSIGNED LONG DIM pe32plus AS LONG DIM bs AS _UNSIGNED LONG DIM addr AS _UNSIGNED LONG DIM nfin AS _UNSIGNED LONG DIM nfout AS _UNSIGNED LONG DIM numnamest8 AS _UNSIGNED LONG DIM dat AS _UNSIGNED LONG DIM siz AS _UNSIGNED LONG DIM rva AS _UNSIGNED LONG DIM fp AS _UNSIGNED LONG DIM bc AS _UNSIGNED LONG DIM bw AS _UNSIGNED LONG DIM w AS _UNSIGNED INTEGER DIM SizeOfOptionalHeader AS _UNSIGNED INTEGER DIM NumberOfSections AS _UNSIGNED INTEGER DIM NumberOfRvaAndSizes AS _UNSIGNED LONG DIM numnames AS _UNSIGNED INTEGER DIM numids AS _UNSIGNED INTEGER DIM x AS _UNSIGNED INTEGER DIM y AS _UNSIGNED INTEGER DIM z AS _UNSIGNED INTEGER DIM b AS _UNSIGNED _BYTE IF _FILEEXISTS(fin) = 0 THEN geticon = 1: EXIT FUNCTION nfin = FREEFILE OPEN fin FOR BINARY ACCESS READ AS nfin GET nfin, 1 + 0, w IF w <> &H5A4D THEN geticon = 2: CLOSE nfin: EXIT FUNCTION GET nfin, 1 + &H3C, dw coff = dw + 4 GET nfin, dw + 1, dw IF dw <> &H4550& THEN geticon = 3: CLOSE nfin: EXIT FUNCTION GET nfin, 1 + coff + 2, NumberOfSections IF NumberOfSections = 0 THEN geticon = 4: CLOSE nfin: EXIT FUNCTION DIM secsva(0 TO NumberOfSections - 1) AS _UNSIGNED LONG DIM secsfp(0 TO NumberOfSections - 1) AS _UNSIGNED LONG GET nfin, 1 + coff + 16, SizeOfOptionalHeader IF SizeOfOptionalHeader = 0 THEN geticon = 5: CLOSE nfin: EXIT FUNCTION GET nfin, 1 + coff + 20, w SELECT CASE w CASE &H10B: pe32plus = 0 CASE &H20B: pe32plus = -1 CASE ELSE: geticon = 6: CLOSE nfin: EXIT FUNCTION END SELECT GET nfin, 1 + coff + 20 + 92 + (16 AND pe32plus), NumberOfRvaAndSizes IF NumberOfRvaAndSizes < 3 THEN geticon = 7: CLOSE nfin: EXIT FUNCTION GET nfin, 1 + coff + 20 + 112 + (16 AND pe32plus), bs GET nfin, 1 + coff + 20 + 4 + 112 + (16 AND pe32plus), dw IF (bs = 0) OR (dw = 0) THEN geticon = 8: CLOSE nfin: EXIT FUNCTION SectionTable = coff + 20 + SizeOfOptionalHeader FOR w = 0 TO NumberOfSections - 1 GET nfin, 1 + SectionTable + 12 + (40 * w), secsva(w) GET nfin, 1 + SectionTable + 20 + (40 * w), secsfp(w) NEXT rva = bs GOSUB rva2fp bs = fp addr = bs 'group icon, first level GET nfin, 1 + addr + 12, numnames GET nfin, 1 + addr + 14, numids numnamest8 = numnames * 8 FOR x = 0 TO numids - 1 GET nfin, 1 + addr + 16 + numnamest8 + (x * 8), dw IF dw = &HE THEN GET nfin, 1 + addr + 16 + 4 + numnamest8 + (x * 8), dw: EXIT FOR END IF NEXT IF x = numids THEN geticon = 9: CLOSE nfin: EXIT FUNCTION IF dw AND &H80000000~& = 0 THEN geticon = 10: CLOSE nfin: EXIT FUNCTION addr = bs + (dw AND &H7FFFFFFF&) 'group icon, second level GET nfin, 1 + addr + 12, numnames GET nfin, 1 + addr + 14, numids IF gi >= numnames + numids THEN geticon = 11: CLOSE nfin: EXIT FUNCTION GET nfin, 1 + addr + 16 + 4 + (gi * 8), dw IF dw AND &H80000000~& = 0 THEN geticon = 12: CLOSE nfin: EXIT FUNCTION addr = bs + (dw AND &H7FFFFFFF&) 'group icon, third level GET nfin, 1 + addr + 12, numnames GET nfin, 1 + addr + 14, numids IF 0 = (numnames + numids) THEN geticon = 13: CLOSE nfin: EXIT FUNCTION GET nfin, 1 + addr + 16 + 4, dw IF dw AND &H80000000~& THEN geticon = 14: CLOSE nfin: EXIT FUNCTION 'search for best icon within icon group dw = bs + dw GET nfin, 1 + dw, rva GET nfin, 1 + 4 + dw, siz GOSUB rva2fp dat = fp SEEK nfin, 1 + dat IF siz < 6 THEN geticon = 15: CLOSE nfin: EXIT FUNCTION GET nfin, 1 + dat, dw IF dw <> &H10000 THEN geticon = 16: CLOSE nfin: EXIT FUNCTION GET nfin, 1 + dat + 4, y IF y = 0 THEN geticon = 17: CLOSE nfin: EXIT FUNCTION IF siz < (6 + (y * 14)) THEN geticon = 18: CLOSE nfin: EXIT FUNCTION bc = 0 bw = 0 FOR x = 0 TO y - 1 GET nfin, 1 + dat + 6 + (x * 14), b IF b = 0 THEN b = 255 'best width, then best color IF (b >= bw) AND (b <= wi) THEN GET nfin, 1 + dat + 6 + (x * 14) + 6, w IF ((w > bc) OR (b > bw)) AND (w <= co) THEN bc = w bw = b GET nfin, 1 + dat + 6 + (x * 14) + 12, z END IF END IF NEXT IF bc = 0 THEN geticon = 19: CLOSE nfin: EXIT FUNCTION addr = bs 'icon, first level GET nfin, 1 + addr + 12, numnames GET nfin, 1 + addr + 14, numids numnamest8 = numnames * 8 FOR x = 0 TO numids - 1 GET nfin, 1 + addr + 16 + numnamest8 + (x * 8), dw IF dw = &H3 THEN GET nfin, 1 + addr + 16 + 4 + numnamest8 + (x * 8), dw: EXIT FOR END IF NEXT IF x = numids THEN geticon = 20: CLOSE nfin: EXIT FUNCTION IF dw AND &H80000000~& = 0 THEN geticon = 21: CLOSE nfin: EXIT FUNCTION addr = bs + (dw AND &H7FFFFFFF&) 'icon, second level GET nfin, 1 + addr + 12, numnames GET nfin, 1 + addr + 14, numids numnamest8 = numnames * 8 FOR x = 0 TO numids - 1 GET nfin, 1 + addr + 16 + numnamest8 + (x * 8), dw IF dw = z THEN GET nfin, 1 + addr + 16 + 4 + numnamest8 + (x * 8), dw: EXIT FOR END IF NEXT IF x = numids THEN geticon = 22: CLOSE nfin: EXIT FUNCTION IF dw AND &H80000000~& = 0 THEN geticon = 23: CLOSE nfin: EXIT FUNCTION addr = bs + (dw AND &H7FFFFFFF&) 'icon, third level GET nfin, 1 + addr + 12, numnames GET nfin, 1 + addr + 14, numids IF 0 = (numnames + numids) THEN geticon = 24: CLOSE nfin: EXIT FUNCTION GET nfin, 1 + addr + 16 + 4, dw IF dw AND &H80000000~& THEN geticon = 25: CLOSE nfin: EXIT FUNCTION 'extract icon dw = bs + dw GET nfin, 1 + dw, rva GET nfin, 1 + 4 + dw, siz GOSUB rva2fp dat = fp IF _FILEEXISTS(fout) THEN geticon = 26: CLOSE nfin: EXIT FUNCTION nfout = FREEFILE OPEN fout FOR BINARY AS nfout GET nfin, 1 + dat + 4, dw 'width, start 4 bytes into BMP header IF dw < &H100 THEN wide = dw ELSE wide = wi GET nfin, , dw 'double height IF dw < &H1FF THEN high = dw \ 2 ELSE high = wi GET nfin, 1 + dat + 14, w 'bpp IF w <= &H20 THEN bpp = w ELSE bpp = co IF m THEN 'Create bitmap format pre-header info of 14 bytes w = CVI("BM") PUT nfout, 1, w 'magic IF bpp <= 8 THEN pal = (2 ^ bpp) * 4: pb = bpp / 8 ELSE pal = 0: pb = 3 dw = 54 + (wide * high * pb) + pal 'file size PUT nfout, , dw 'file size dw = 0 PUT nfout, , dw '2 reserved dw = 54 + pal 'bitmap header offset + palette if used PUT nfout, , dw 'data offset ELSE 'Create icon format Icon header and Entry header w = 0 PUT nfout, 1, w 'reserved w = 1 '1 = icon, 2 = cursor(this could be set by mode value) PUT nfout, , w 'resource id PUT nfout, , w 'icon count is always one in this procedure b = wide PUT nfout, , b 'width in Entry header b = high PUT nfout, , b 'height IF bpp < 8 THEN b = 2 ^ bpp ELSE b = 0 PUT nfout, , b 'num of colors b = 0: w = 0 PUT nfout, , b 'reserved PUT nfout, , w 'column hot spot for cursor PUT nfout, , w 'row hot spot for cursor PUT nfout, , siz 'size of data dw = 22 'offset of bmp header is 6 + 16 bytes PUT nfout, , dw END IF SEEK nfin, 1 + dat 'seek start of bmp 40 byte header IF m THEN GET nfin, , dw PUT nfout, , dw 'header size GET nfin, , dw dw = wide PUT nfout, , dw 'width dw = high PUT nfout, , dw 'height GET nfin, , dw 'ignore double height siz = (wide * high * pb) + 28 + pal 'stop at AND mask END IF FOR dw = 1 TO siz 'GET remaining image data including GET nfin, , b ' 'BMP header, palette and mask(s) PUT nfout, , b NEXT dw CLOSE nfout CLOSE nfin geticon = 0 EXIT FUNCTION rva2fp: 'call with rva returns fp modifies w FOR w = 0 TO NumberOfSections - 1 IF rva < secsva(w) THEN EXIT FOR NEXT w = w - 1 IF w > NumberOfSections - 1 THEN geticon = 27: CLOSE nfin: EXIT FUNCTION fp = rva + (secsfp(w) - secsva(w)) RETURN END FUNCTION FUNCTION geticonerror$ (n AS LONG) 'revision date, last person to revise revision 20111031, michael calkins '(derivitives may list sources of derivision) october 2011, public domain, michael calkins SELECT CASE n CASE 0: geticonerror = "success" CASE 1: geticonerror = "input file not found" CASE 2: geticonerror = "MZ signature not found" CASE 3: geticonerror = "PE signature not found" CASE 4: geticonerror = "no sections found" CASE 5: geticonerror = "optional header not found" CASE 6: geticonerror = "unknown PE optional header" CASE 7: geticonerror = "no resource table" CASE 8: geticonerror = "no resource table" CASE 9: geticonerror = "icon groups not found" CASE 10: geticonerror = "icon group: 1st level entry is a leaf" CASE 11: geticonerror = "specified icon group not found" CASE 12: geticonerror = "icon group: 2nd level entry is a leaf" CASE 13: geticonerror = "no language for specified icon group" CASE 14: geticonerror = "icon group: 3rd level entry is not a leaf" CASE 15: geticonerror = "icon group data is too small" CASE 16: geticonerror = "icon group data is not as expected" CASE 17: geticonerror = "no icons in group" CASE 18: geticonerror = "icon array is too small" CASE 19: geticonerror = "could not find an icon matching the specifications" CASE 20: geticonerror = "icons not found" CASE 21: geticonerror = "icon: 1st level entry is a leaf" CASE 22: geticonerror = "target icon not found" CASE 23: geticonerror = "icon: 2nd level entry is a leaf" CASE 24: geticonerror = "no language for target icon" CASE 25: geticonerror = "icon: 3rd level is not a leaf" CASE 26: geticonerror = "output file already exists" CASE 27: geticonerror = "could not convert rva to fp" CASE ELSE: geticonerror = "unknown error" END SELECT END FUNCTION

Note: Change the file name to .BMP and mode to 1 to extract the icon as a bitmap for QB64 to use. QB64 cannot load icons!
Have fun, and don't forget to double check it before relying on it. I appreciate bug reports, but I'm not responsible for errors.
Regards, Michael Calkins


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Extract Resources

'revision 20120316, michael calkins 'october 2011, michael calkins 'my code is public domain, but it's based on Microsoft's spec, so I'm not sure 'what kind of patents or copyrights apply. 'based on the Microsoft PE and COFF spec, Revision 8.2 - September 21, 2010 'http://msdn.microsoft.com/en-us/windows/hardware/gg463119.aspx 'bug fixes on 2012 03 16: ' changed NumberOfRvaAndSizes to an _unsigned long ' added _CONTROLCHR OFF to the dump sub, and replaced the select case DIM nam AS STRING * 8 DIM fil AS STRING DIM k AS STRING DIM dw AS _UNSIGNED LONG DIM ul AS _UNSIGNED LONG DIM coff AS _UNSIGNED LONG DIM SectionTable AS _UNSIGNED LONG DIM ImageBase AS _UNSIGNED LONG DIM rsrc AS _UNSIGNED LONG DIM pe32plus AS LONG DIM w AS _UNSIGNED INTEGER DIM SizeOfOptionalHeader AS _UNSIGNED INTEGER DIM SHARED NumberOfSections AS _UNSIGNED INTEGER DIM NumberOfRvaAndSizes AS _UNSIGNED LONG CLS fil = COMMAND$ IF LEN(fil) = 0 THEN LINE INPUT "Name of the PE image to open? "; fil IF _FILEEXISTS(fil) = 0 THEN PRINT "File not found.": END OPEN fil FOR BINARY ACCESS READ AS 1 GET 1, 1 + 0, w IF w <> &H5A4D THEN PRINT "No MZ signature.": END GET 1, 1 + &H3C, dw coff = dw + 4 GET 1, dw + 1, dw IF dw <> &H4550& THEN PRINT "No PE signature.": END GET 1, 1 + coff + 2, NumberOfSections IF NumberOfSections = 0 THEN PRINT "No sections.": END PRINT "NumberOfSections:"; NumberOfSections DIM SHARED secsva(0 TO NumberOfSections - 1) AS _UNSIGNED LONG DIM SHARED secsfp(0 TO NumberOfSections - 1) AS _UNSIGNED LONG GET 1, 1 + coff + 16, SizeOfOptionalHeader IF SizeOfOptionalHeader = 0 THEN PRINT "No optional header.": END PRINT "SizeOfOptionalHeader:", SPACE$(4); word$(SizeOfOptionalHeader) GET 1, 1 + coff + 20, w SELECT CASE w CASE &H10B: pe32plus = 0: PRINT "PE32" CASE &H20B: pe32plus = -1: PRINT "PE32+" CASE ELSE: PRINT "Unknown Magic.": END END SELECT GET 1, 1 + coff + 20 + 28 + (-4 AND pe32plus), ImageBase PRINT "ImageBase:", "", dword$(ImageBase) GET 1, 1 + coff + 20 + 92 + (16 AND pe32plus), NumberOfRvaAndSizes IF NumberOfRvaAndSizes < 3 THEN PRINT "No resource table.": END PRINT "NumberOfRvaAndSizes:"; NumberOfRvaAndSizes GET 1, 1 + coff + 20 + 112 + (16 AND pe32plus), rsrc PRINT "Rva of resource table:", dword$(rsrc) GET 1, 1 + coff + 20 + 4 + 112 + (16 AND pe32plus), dw PRINT "Size of resource table:", dword$(dw) IF (rsrc = 0) OR (dw = 0) THEN PRINT "No resource table.": END SectionTable = coff + 20 + SizeOfOptionalHeader PRINT "section", "va", "file ptr" FOR w = 0 TO NumberOfSections - 1 GET 1, 1 + SectionTable + (40 * w), nam GET 1, 1 + SectionTable + 12 + (40 * w), ul GET 1, 1 + SectionTable + 20 + (40 * w), dw PRINT nam, dword$(ul), dword$(dw) secsva(w) = ul secsfp(w) = dw NEXT PRINT PRINT "Proceed? "; DO k = LCASE$(INKEY$) IF k = "n" THEN PRINT k: END LOOP UNTIL k = "y" PRINT k dw = rva2fp(rsrc) processtable dw, dw, 0 SYSTEM SUB processtable (bs AS _UNSIGNED LONG, addr AS _UNSIGNED LONG, level AS INTEGER) DIM k AS STRING DIM dw AS _UNSIGNED LONG DIM numnamest8 AS _UNSIGNED LONG DIM dat AS _UNSIGNED LONG DIM siz AS _UNSIGNED LONG DIM so AS LONG DIM sc AS LONG DIM numnames AS _UNSIGNED INTEGER DIM numids AS _UNSIGNED INTEGER DIM w AS _UNSIGNED INTEGER DIM ln AS _UNSIGNED INTEGER DIM x AS _UNSIGNED INTEGER DIM y AS _UNSIGNED INTEGER DIM b AS _UNSIGNED _BYTE GET 1, 1 + addr + 12, numnames GET 1, 1 + addr + 14, numids DIM nams(0 TO numnames + (numnames > 0)) AS STRING DIM namsrva(0 TO numnames + (numnames > 0)) AS _UNSIGNED LONG DIM ids(0 TO numids + (numids > 0)) AS _UNSIGNED LONG DIM idsrva(0 TO numids + (numids > 0)) AS _UNSIGNED LONG 'get named entries FOR x = 0 TO numnames - 1 GET 1, 1 + addr + 16 + (x * 8), dw 'the spec says its an rva, but it seems to be an offset in the section/table 'low 31 bits are an offset from bs GET 1, 1 + bs + (dw AND &H7FFFFFFF), ln FOR y = 0 TO ln - 1 GET 1, , w SELECT CASE w CASE &H20 TO &H7E: nams(x) = nams(x) + CHR$(w) CASE ELSE: nams(x) = nams(x) + CHR$(&H1A) END SELECT IF y = 68 THEN EXIT FOR NEXT GET 1, 1 + addr + 16 + 4 + (x * 8), namsrva(x) NEXT 'get numbered entries: numnamest8 = numnames * 8 FOR x = 0 TO numids - 1 GET 1, 1 + addr + 16 + numnamest8 + (x * 8), ids(x) GET 1, 1 + addr + 16 + 4 + numnamest8 + (x * 8), idsrva(x) NEXT 'display: VIEW PRINT sc = 0 so = 0 DO CLS 0 'qb64 bug? not locating to 1,1? LOCATE 1, 1 SELECT CASE level CASE 0: PRINT "1st level - Type"; CASE 1: PRINT "2nd level - Name"; CASE 2: PRINT "3rd level - Language"; CASE ELSE: PRINT LTRIM$(STR$(level)) + "th level"; END SELECT PRINT "", "file ptr: "; dword$(addr); ". Press 'D' to dump." PRINT numnames; "names in this level, in this branch." PRINT numids; "IDs in this level, in this branch." IF (numnames OR numids) = 0 THEN IF level THEN PRINT "Press any key to go up one level." SLEEP: DO: LOOP WHILE LEN(INKEY$) EXIT SUB ELSE END END IF END IF PRINT "names are unicode. For simplicity, non ASCII chars will be shown as " + CHR$(&H1A) + "." IF level THEN PRINT "BKSP or ESC to go up one level." ELSE PRINT "BKSP or ESC to exit." END IF PRINT "UP, DOWN, PGUP, PGDN, HOME, END to navigate list." PRINT "ENTER to select." LOCATE 9, 1 PRINT STRING$(80, &HC4); LOCATE 22, 1 PRINT STRING$(80, &HC4); DO COLOR 7, 0 LOCATE 8, 1: PRINT dword$(sc) FOR x = 0 TO 11 LOCATE 10 + x, 1 IF x + so = sc THEN COLOR 15, 1 ELSE COLOR 7, 0 IF (x + so) < numnames THEN PRINT nams(x + so); SPACE$(70 - LEN(nams(x + so))); PRINT dword$(bs + (namsrva(x + so) AND &H7FFFFFFF&)); COLOR 7, 0 LOCATE 7, 18 IF namsrva(x + so) AND &H80000000~& THEN PRINT "(descend)"; ELSE PRINT "(extract)"; END IF ELSEIF (x + so) < (numnames + numids) THEN PRINT "ID: " + dword$(ids(x + so - numnames)); IF level = 0 THEN PRINT " (RT_"; 'derived from: ' http://msdn.microsoft.com/en-us/library/ms648009(v=VS.85).aspx SELECT CASE ids(x + so - numnames) CASE 9: PRINT "ACCELERATOR"; CASE 21: PRINT "ANICURSOR"; CASE 22: PRINT "ANIICON"; CASE 2: PRINT "BITMAP"; CASE 1: PRINT "CURSOR"; CASE 5: PRINT "DIALOG"; CASE 17: PRINT "DLGINCLUDE"; CASE 8: PRINT "FONT"; CASE 7: PRINT "FONTDIR"; CASE 12: PRINT "GROUP_CURSOR"; CASE 14: PRINT "GROUP_ICON"; CASE 23: PRINT "HTML"; CASE 3: PRINT "ICON"; CASE 24: PRINT "MANIFEST"; CASE 4: PRINT "MENU"; CASE 11: PRINT "MESSAGETABLE"; CASE 19: PRINT "PLUGPLAY"; CASE 10: PRINT "RCDATA"; CASE 6: PRINT "STRING"; CASE 16: PRINT "VERSION"; CASE 20: PRINT "VXD"; END SELECT PRINT ")"; END IF PRINT SPACE$(71 - POS(0)); PRINT dword$(bs + (idsrva(x + so - numnames))); COLOR 7, 0 LOCATE 7, 18 IF idsrva(x + (so - numnames)) AND &H80000000~& THEN PRINT "(descend)"; ELSE PRINT "(extract)"; END IF ELSE PRINT SPACE$(80); END IF NEXT DO k = INKEY$ LOOP UNTIL LEN(k) SELECT CASE k CASE "d", "D" dump addr EXIT DO CASE MKI$(&H4800) 'up IF sc > 0 THEN sc = sc - 1 IF sc < so THEN so = sc END IF CASE MKI$(&H5000) 'down IF sc < (numnames + numids - 1) THEN sc = sc + 1 IF sc > (so + 11) THEN so = sc - 11 IF so > sc THEN so = 0 'unsigned END IF END IF CASE MKI$(&H4700) 'home sc = 0 so = 0 CASE MKI$(&H4F00) 'end sc = numnames + numids - 1 so = sc - 11 IF so < 0 THEN so = 0 CASE MKI$(&H4900) 'pgup sc = sc - 12 so = so - 12 IF sc < 0 THEN sc = 0 IF so < 0 THEN so = 0 CASE MKI$(&H5100) 'pgdn sc = sc + 12 IF sc > (numnames + numids - 1) THEN sc = numnames + numids - 1 so = sc - 11 IF so < 0 THEN so = 0 CASE CHR$(&H8), CHR$(&H1B) 'bksp, esc EXIT SUB CASE CHR$(&HD) 'enter IF sc < numnames THEN dw = namsrva(sc) ELSE dw = idsrva(sc - numnames) END IF IF dw AND &H80000000~& THEN 'the spec says its an rva, but it seems to be an offset in the section/table processtable bs, bs + (dw AND &H7FFFFFFF&), level + 1 EXIT DO ELSE 'the spec says its an rva, but it seems to be an offset in the section/table dw = bs + dw GET 1, 1 + dw, dat GET 1, 1 + 4 + dw, siz CLS LOCATE 1, 1 'qb64 seems to default to line 2 SEEK 1, 1 + rva2fp(dat) FOR dw = 1 TO siz IF dw > 400 THEN EXIT FOR GET 1, , b SELECT CASE b CASE 7, 9 TO &HD, &H1F: PRINT "."; CASE ELSE: PRINT CHR$(b); END SELECT NEXT LOCATE 24, 1 PRINT dword$(siz) + " bytes."; LOCATE 23, 1 LINE INPUT "(leave blank to cancel) Output file? "; k IF LEN(k) THEN IF _FILEEXISTS(k) THEN PRINT PRINT "File already exists."; ELSE OPEN k FOR BINARY AS 2 SEEK 1, 1 + rva2fp(dat) FOR dw = 1 TO siz GET 1, , b PUT 2, , b NEXT CLOSE 2 PRINT PRINT "Done."; END IF SLEEP: DO: LOOP WHILE LEN(INKEY$) END IF EXIT DO END IF END SELECT LOOP LOOP END SUB FUNCTION word$ (w AS _UNSIGNED INTEGER) DIM t AS STRING t = LCASE$(HEX$(w)) word = "0x" + STRING$(4 - LEN(t), &H30) + t END FUNCTION FUNCTION dword$ (dw AS _UNSIGNED LONG) DIM t AS STRING t = LCASE$(HEX$(dw)) dword = "0x" + STRING$(8 - LEN(t), &H30) + t END FUNCTION FUNCTION rva2fp~& (rva AS _UNSIGNED LONG) DIM w AS _UNSIGNED INTEGER FOR w = 0 TO NumberOfSections - 1 IF rva < secsva(w) THEN EXIT FOR NEXT w = w - 1 IF w > NumberOfSections - 1 THEN PRINT dword$(rva), w: SLEEP rva2fp = rva + (secsfp(w) - secsva(w)) END FUNCTION SUB dump (addr AS _UNSIGNED LONG) DIM t AS STRING DIM dw AS _UNSIGNED LONG DIM ul AS _UNSIGNED LONG DIM b AS _UNSIGNED _BYTE _CONTROLCHR OFF VIEW PRINT ul = addr DO COLOR 7, 0 CLS 0 SEEK 1, 1 + ul FOR dw = ul TO (ul AND &HFFFFFFF0) + &H15F IF (1 + ul) > LOF(1) THEN EXIT FOR GET 1, , b IF (dw AND &HF) = 0 THEN t = LCASE$(HEX$(dw)) COLOR 7 PRINT STRING$(8 - LEN(t), &H30) + t; SPACE$(2); END IF IF (dw AND &H4) THEN COLOR 3 ELSE COLOR 2 LOCATE , 14 + ((dw AND &HF) * 3) t = LCASE$(HEX$(b)) IF b < &H10 THEN PRINT "0" + t; ELSE PRINT t; LOCATE , 65 + (dw AND &HF) PRINT CHR$(b); NEXT PRINT COLOR 7 LINE INPUT "(leave blank to cancel) Address: 0x"; t IF LTRIM$(t) = "" THEN EXIT DO ul = VAL("&h" + t + "&") AND &H7FFFFFFF LOOP END SUB

Code courtesy of Michael Calkins


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