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  Arguments
 
    x, y      Viewport coordinates for end of line from current
              position
 
    wx, wy    Window coordinates for end of line from current
              position
 
  Description
 
    The _LineTo procedures draw a line from the current position to a
    specified point using the current color, line-style mask, and
    logical write mode. The destination point for _LineTo is given by
    the view coordinate (x,y). The destination point for _LineTo_w
    is given by window coordinate (wx,wy).
 
    If no error occurs, _LineTo updates the current position to the
    destination view coordinates (x,y); _LineTo_w updates the current
    position to window coordinates (wx,wy).
 
    If the _FloodFill procedure is used to fill in a closed figure
    drawn using _LineTo, the figure must be drawn with a solid
    line-style pattern, using a suitable write mode.
 
  _GrStatus Returns
 
    _GrClipped, _GrNoOutput, _GrNotInProperMode