From QB64 Wiki
The SIGNAL keyword was reserved for OS/2 systems (protected mode). See the example for more information about how and why it is used.
- SIGNAL(number) ON
- Currently NOT supported in QB64!
- It will only work with compiler 6.00 and 6.00b and Basic PDS 7.00 when compiling in protected mode under OS/2. In all other situations, a SIGNAL statement results in an "Advanced feature unavailable" error message.
Output: It returns the following when Ctrl-Break is pressed
This program traps CTRL+BREAK in OS/2. Try it. CTRL+BREAK trapped. Press any key to quit
Error message in QB4.5 if not using OS 2:
Advanced feature unavailable
Source: Microsoft KB41389 []
- ON KEY (n)