Keywords currently not supported by QB64

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

Keywords not supported in all versions

ALIAS (supported in DECLARE LIBRARY only)
ANY
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 (must be reworked into actual FUNCTIONs)
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, UEVENT (statement)
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 macOS 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.

Desktop and Window calls: