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INQVP2

       SUBROUTINE  INQVP2  (XMINP,XMAXP,YMINP,YMAXP)
 C$    (Inquire 2-D Viewport Size)
 C$    Return the  current  values  of the  2-D  viewport  extents
 C$    measured in Normalized Device Coordinates (range 0.0..1.0).
 C$    (01-APR-82)