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  Constant:  _CGA, _EGA, _HGC, _MCGA, _MDPA, _OCGA, _OEGA, _OVGA, _VGA
 
  Include:   <graph.h>
 
  Context:   _getvideoconfig
 
  Synopsis:  Value given by adapter element of videoconfig structure.
             This value indicates the currently active video adapter.
 
     The video adapter constants and their meanings are listed below:
 
     Adapter
     Constant     Meaning
 
     _CGA         Color Graphics Adapter
     _EGA         Enhanced Graphics Adapter
     _HGC         Hercules Graphics Card
     _MCGA        Multicolor Graphics Array
     _MDPA        Monochrome Display Adapter
     _OCGA        Olivetti (AT&T) Color Graphics Adapter
     _OEGA        Olivetti (AT&T) Enhanced Graphics Adapter
     _OVGA        Olivetti (AT&T) Video Graphics Array
     _VGA         Video Graphics Array