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 ISCGA() 


          Determines if the current screen is driven by a Color Graphics
          Adapter (CGA).  Adapters which are supersets of the CGA standard
          should be tested for EGA or VGA compatibility first.  An EGA or VGA
          emulating a CGA will not return indicating a CGA is attached.
          Returns a logical true (.T.) or false (.F.) indicator.


      Format: 

               iscga()


      Parameters: 

               None.


      Examples: 

               1.   Determine if the current monitor is standard CGA.

                    .
                    .
                    .
                    if iscga()
                         (do color stuff)
                    endif
                    .
                    .
                    .


      Returns: 

               .T.  .....Indicates that the current screen is a CGA type.

               .F.  .....Indicates that the current screen is not a CGA type.


      Cautions: 

               None.