key

Im really off today, and im new to TGB but how what would I say to make this on#1Key instead of Mouse Up?
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function SwapImageBehavior::onRightMouseUp(%this, %dstObj, %srcRef, %dstRef, %time, %normal, %
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contactCount, %contacts)
{
if (isObject(%this.image))
%this.owner.setImageMap(%this.image, %this.frame);
}