In case Galleon didn't see the thread, it looks like the QB64-GL IDE doesn't support, or doesn't reliably support, entering of the IBM extended characters set (by pressing the <alt> key while typing the 128-255 codes at the keypad). I did go to "options" and "language," tried every cotton-pickin' one, no luck. Although others on the list appear to have had success? Hard to say for sure. I didn't know for sure if they were using SDL or GL, is the problem.
This occurs on both of my PCs, even though on both PCs, using that <alt> key technique works fine in MS Word, e-mail, etc. So it's not some PC setting, as far as I can tell, that's preventing this.
I do use that extended character set. I wouldn't even mind too much a re-map to other extended characters, but as is, the <alt> key technique simply won't work for entering anything at all.
It would be super nice to have one of those "language" options in the IDE be MS-DOS, or similar, for example.
In case others have noticed this, there is a laborious workaround. Use MS Word to type all those extended characters. Save the document as "encoded text" and "MS-DOS." Then open that saved document in the QB64 IDE. The correct characters will show up. Now you can keep this IDE open, have another IDE open with the program you're working on, and then cut and paste these characters as needed.