Keywords currently not supported by QB64

The keywords listed here are not supported in QB64. QB64 is meant to be compatible with QB 4.5 or lower versions. PDS (7.1) is not supported. Older code that uses these keywords won't generate errors, as these are ignored by the compiler.

ALIAS (supported in DECLARE LIBRARY only)
ANY (See DECLARE LIBRARY)
BYVAL (supported in DECLARE LIBRARY only)
CALLS
CDECL
DATE$ (statement) (reading the current DATE$ is supported)
DECLARE (non-BASIC statement)
DEF FN, EXIT DEF, END DEF
ERDEV, ERDEV$
FILEATTR
FRE
IOCTL, IOCTL$
OPEN with devices like LPT, CON, KBRD, and other devices is not supported. LPRINT and OPEN COM are supported.
ON PEN, PEN (statement), PEN (function)
ON PLAY(n), PLAY(n) ON/OFF/STOP. (PLAY music is supported.)
ON UEVENT
SETMEM
SIGNAL
TIME$ (statement) (reading the current TIME$ is supported)
TRON, TROFF
WIDTH LPRINT combined statement is not supported.

Keywords Not Supported in Linux or MAC OSX versions

The commands listed here contain platform-specific calls and may be implemented in the future in Linux and macOS. These commands currently result in stub calls which do nothing.

NOTE: The IDE does not support the opening or retrieval of more than one program at a time, but multiple instances of the IDE can be used simultaneously.

Some OS Specific window/desktop calls: