The code works fine, I am starting to get a little tired of the demands of the artwork which is yet another learning curve but the example shows how they work. These 64 pixel images are large, even as PNG files so the exe size is large by assembler standards but probably not by modern high level code standards. The logic is simple, one up and one down image that changes as you click on it and it sends a WM_COMMAND message to the parent app.