I have a know rectangle of which I know the Min and Max bounding points. I need to create a selectionset of some entities that are located inside this rectangle. The selection works fine as long as the current coordinate system is the WC, however it fails if there is a UCS which could be also unsaved/named. I have done some work with coordinate systems a few months back, but can not find anything now. Can someone give me a hand and tell me a quick and safe way of doing this. It is late and my brain is completely fried. I will really apreciate the help.