C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
_setviewport
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─────Run-Time Library───────────────────────────────────────────────────────
 
  Include:   <graph.h>
 
  Syntax:    void _setviewport( short x1, short y1,
                                short x2, short y2 );
 
  See also:  _setwindow, _setcliprgn, _setvieworg, _getphyscoord,
             _getviewcoord, _getwindowcoord
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