FT_CHDIR()       Change the current directory
 FT_DEFAULT()     Retrieve and optionally change the current default drive
 FT_DOSVER()      Return the current DOS major and minor version as a string
 FT_DSKFREE()     Return the amount of available disk space
 FT_DSKSIZE()     Return the maximum capacity of a fixed disk
 FT_FLOPTST()     Test diskette drive status
 FT_HANDCNT()     Count number of available DOS (not network) file handles
 FT_INP()         Retrieve a byte from a specified I/O port
 FT_INT86()       Execute a software interrupt
 FT_ISPRINT()     Check printer status
 FT_ISSHARE()     Determine if DOS "Share" is installed
 FT_MKDIR()       Create a subdirectory
 FT_OUTP()        Write a byte to a specified I/O port
 FT_PEEK()        Retrieve a byte from a specified memory location.
 FT_POKE()        Write a byte to a specified memory location
 FT_REBOOT()      Force a warm or cold boot
 FT_RMDIR()       Delete a subdirectory
 FT_SETDATE()     Set the DOS system date
 FT_SETTIME()     Set the DOS system time
 FT_SYSMEM()      Determine the amount of conventional memory installed
 FT_TEMPFIL()     Create a file with a unique name