C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
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_getwritemode
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─────Run-Time Library───────────────────────────────────────────────────────
 
     The _getwritemode function returns the current logical write mode,
     which is used when drawing lines with the _lineto, _polygon, and
     _rectangle functions.
 
     The default value is _GPSET, which causes lines to be drawn in
     the current graphics color. The other possible return values are
     _GAND, _GOR, _GPRESET, and _GXOR.
 
     Return Value
 
     The _getwritemode function returns the current logical write mode,
     or -1 if not in graphics mode.
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