Hi All:
I'm trying to make a non-square window using Visual C++, what I've done is filled in all the whitespace of my background image with my transparency key (say, yellow), and then include in the background in my control.

I then include the control into my Form, and set the transparency key (yellow), and turned off the border.

When I build and run the exe, what I get it is a semi-transparent window that has a halo of the transparency key around it.

I know I'm doing something wrong, but can't figure out what. Can anyone out there help me??