<pre>on testInverseRect  -- temporary inverse video of a screen picture  put item 1 of the rect of btn 1 into x1  put item 2 of the rect of btn 1 into y1  put item 3 of the rect of btn 1 into x2  put item 4 of the rect of btn 1 into y2  inverseRect x1,y1,x2,y2end testInverseRect</pre>