|It's really easy. First of all, in your onpaint, do two DrawRectangle calls on the graphics object. Then, you take each point that is a corner of one rectangle, and call the PtInRect method to see if it occurs inside the other rectangle. If any of htem do, then they intersect.
I'm going on memory, I may have some method names wrong, but those methods all exist, and will do what you want.
It's when you want to work out if irregular shapes intersect that you have issues.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )