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  Arguments
 
    x, y      Physical coordinates to be translated
 
    wx, wy    Window coordinates to be translated
 
    wxy       Window coordinates in _WXYCoord record to be translated
 
    xy        Record variable to store translated coordinates
 
  Description
 
    The _GetViewCoord routines translate specified coordinates from
    another coordinate system to the viewport coordinate system and
    store them in an _XYCoord record.
 
    The _GetViewCoord routines are
 
      Procedure            Translation
      ═════════════════    ══════════════════════════════════════
      _GetViewCoord        Physical coordinates (x,y) to viewport
                           coordinates
      _GetViewCoord_w      Window coordinates (wx,wy) to viewport
                           coordinates
      _GetViewCoord_wxy    Window coordinates in _WXYCoord record
                           (wxy) to viewport coordinates
 
  _GrStatus Returns
 
    _GrNotInProperMode