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                                 L_CHKMDRVR()


Syntax:        L_CHKMDRVR()


Purpose:       To determine if the mouse driver is present or absent.


Arguments:     None.


Returns:       A logical (.T.) is returned if the mouse driver is
               present and functional.
               A logical (.F.) is returned if the mouse driver is
               absent or non-functional.


Usage:         L_CHKMDRVR() must return .T. if the mouse functions are
               to be used.


Examples:      * Check for presence of mouse driver
               status = L_CHKMDRVR()
               IF status
                  buttons = L_ISMOUSE()
                  IF buttons=0
                     @ 10,10 say "Mouse driver functional."
                     @ 11,10 say "Mouse absent of not functional."
                     wait
                  ENDIF
               ELSE
                  @ 10,10 say "Mouse driver not present."
               ENDIF


Language:      Assembler