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  vupdaterows                                                           WNDWC
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  Function       Updates certain rows in the current virtual window view only
                 on the top window.
  Syntax         void vupdaterows( unsigned char row, unsigned char rows );
  Remarks        This routine is primarily used for fast response for spot
                 updates for data entry or the like where the fastest speed
                 is desirable.  If the window is not the top window, the
                 entire view is updated.
  Return value   None.