All controls.
When set to false, prevents the display of visual changes in a particular window until re-set to true. This is particularly useful when a lot of manipulation is taking place and you don't want to redraw after each manipulation. Remember to reset this property to true when you have completed the manipulations.
status = Set_Property(windowID, "REDRAW", truefalse)
status = Get_Property(windowID, "REDRAW")