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SMG$GET_VIEWPORT_CHAR

   The Get Characteristics of Display Viewport routine returns the
   characteristics of the specified viewport.

   Format

     SMG$GET_VIEWPORT_CHAR  display-id [,viewport-row-start]

                            [,viewport-column-start]

                            [,viewport-number-rows]

                            [,viewport-number-columns]

Additional information available:

Returns         Arguments