Graph Unit 
                           Graphic Driver Constants 

      PURPOSE:  Constant declarations used for Graphic drivers

      REMARKS:  Use these constants with InitGraph and DetectGraph.

                          Const
                             Detect        = 0;
                             CGA           = 1;
                             MCGA          = 2;
                             EGA           = 3;
                             EGA64         = 4;
                             EGAMono       = 5;
                             IBM8514       = 6;
                             HercMono      = 7;
                             ATT400        = 8;
                             VGA           = 9;
                             PC3270        = 10;
                             CurrentDriver = -128;