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  Routine:      PC_SET_MOUSE_HIDE_AREA
 
  Function:     Defines an area ("collision area") where the mouse
                is to be invisible.
 
  Syntax:       CALL "PC_SET_MOUSE_HIDE_AREA" USING     mouse-handle
                                                        collision-area
                                              RETURNING status-code
 
  Parameters:   mouse-handle           PIC X(4) COMP-X.
                collision-area         Group item defined as:
                  top-row                PIC X(2) COMP-X.
                  left-col               PIC X(2) COMP-X.
                  bottom-row             PIC X(2) COMP-X.
                  right-col              PIC X(2) COMP-X.
                status-code            See ◄Key►
                                    -♦-