Function            DESQgetbuf - get DESQview virtual screen info

  Syntax              char far *DESQgetbuf(unsigned segment,
                                           unsigned *size);

  Prototype in        multihk.h

  Remarks             this function will return a far pointer to the
                      virtual screen buffer for the window specified by
                      segment, where segment is the segment of the object
                      handle for the window. If segment is zero, the
                      default will be used. The size parameter will be
                      used to return the size of the virtual screen in
                      bytes.

  Return value        returns a far pointer to the virtual screen for the
                      specified window.