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 R_IsVGA() 
 Determines if a VGA card is present
------------------------------------------------------------------------------

 Syntax
        lIsVGA := R_IsVGA ()

 Parameters
        (None)

 Returns
        lIsVGA          .T. :   VGA card is present or can be emulated
                        .F. :   No VGA card present

 Description
        This function can determine if the PC supports VGA.

 Example
        IF R_IsVGA ()
                R_ShowPCX ( 'STANDVGA.PCX' )
                [...]
        ELSE
                Alert ( 'Minimum requirement is a VGA adapter !' )

        ENDIF
See Also: R_IsEGA() R_IsMCGA() R_IsSVGA() R_ShowPCX()
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