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 _getimage_w()           Store a screen image (window coords)

 #include   <graph.h>

 void _getimage_w(wx1, wy1, wx2, wy2, image);
 double wx1, wy1;       Upper left of image
 double wx2, wy2;       Lower right of image
 char _huge *image;     Image storage buffer

    _getimage() is the window coordinates version of _getimage(); it
    stores a screen image in memory. The image on the screen is
    bounded by (wx1, wy1) and (wx2, wy2), and it is stored in
    the buffer image. See _getimage() for more information. Also see
    _imagesize() to determine the size of the image.

     Portability:     MS-DOS only, true MDPA, CGA, EGA, MCGA, or VGA video
                      compatibles