h6. [[WindowManager]] h6(. » [[WindowManager SWI Calls|SWI Calls]] h6((. » [[Wimp_ForceRedraw|Wimp_ForceRedraw]] h6(((. » Wimp_ForceRedraw (mark invalid area syntax) h2. Wimp_ForceRedraw (mark invalid area syntax) h5. (SWI &400D1) |_<. Entry | | |/3<^. R0 |Window handle, or | |-1 for absolute screen co-ordinates | |-2 for icon bar | |R1 |Minimum x of area | |R2 |Minimum y of area | |R3 |Maximum x of area | |R4 |Maximum y of area | |_<. Exit | | |R0 |Corrupt | h4. Use This syntax form marks an area of a screen as invalid, so it can be redrawn later. h4. Notes Co-ordinates are relative to the window’s work area, unless R0 = -1 on entry, in which case absolute screen co-ordinates should be provided. This call should not be used for animation, or other temporary changes. Under these circumstances [[Wimp_UpdateWindow|Wimp_UpdateWindow]] should be used instead. Under the nested wimp, windows belonging to other applications can be marked as invalid. h4. See also * [[Wimp_ForceRedraw (extended syntax)|Wimp_ForceRedraw (extended syntax)]]