Hi this project is actually C++/CLI but I expected more useful help from the .NET developers (most things are similar).
So, I have a transparent form (completely transparent) and I want to draw a visible rectangle onto it and since I am using C++/CLI I was hoping to do it in WinForms instead of WPF. A quick google search gave me some results that didn't work (or at least I couldn't make them work.)
--Actually I decided setting the transparency key to "control" works.