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  Returns
 
    Integer    Current logical write mode for line drawing
 
  Description
 
    The _GetWriteMode function returns the current logical write
    operation, which is used when drawing lines with the _LineTo
    procedures and the _Rectangle functions. _GPSET, the default,
    causes lines to be drawn in the current graphics color. _GXOR
    performs a logical exclusive-or operation with the original screen
    image. The other values, _GAND, _GOR, and _GPRESET, specify other
    logical operations. See the _PutImage help entry for more details
    on these constants.
 
  _GrStatus Returns
 
    _GrNotInProperMode