GT_CHDIR() Change the current directory.
GT_CLUSFRE() Get the number of free clusters on a drive.
GT_CLUSTER() Get the number of clusters on a drive.
GT_CURDRIVE() Retreive The Current Drive Letter
GT_DISKSIZE() Return the size of a disk in bytes.
GT_FILESPACE() Calculate the ``real'' size of a file.
GT_FLOPCNT() Return a count of the floppy drives on a system.
GT_FLOPNAM() Get the name of the floppy drive on a single floppy system.
GT_HARDCNT() Return a count of the hard drives on a system.
GT_MKDIR() Make a new directory.
GT_RMDIR() Remove a directory.
GT_SECPCLU() Get the number of sectors per cluster on a drive.
GT_SECTSIZ() Get the size of a sector on a drive.