GT_ARGC() Returns the number of parameters on the command line
GT_ARGV() Returns a command line parameter
GT_BREAK() Set/Get the DOS break flag.
GT_ENVCOUNT() Returns the number of environment entries
GT_ENVIRON() Returns a command line parameter
GT_EXENAME() Return the name of the .EXE.
GT_ISDESQ() Check if application is running under DesqView
GT_POPCUR() Pop cursor state from the stack.
GT_PSPSEG() Get the location of the program's PSP.
GT_PUSHCUR() Place cursor state on the stack, optionaly change state
GT_REMOTE() Check if a drive as a remote drive.
GT_VERIFY() Set/Get the DOS verify flag.