A few weeks ago, I was requested to build a small software that needed an irregular window shape. Intead of loose time searching through the Windows API, follow this tip: use Delphi Odd Form. It allows you to shape your application with a simple image. The form will be just like the outline of that image. You just have to scan the image and include the resulting .PAS file in your project. Then, call the right function and voilá: a custom shaped form facing you!