



If you want to know more about the non-client-area, check out Vista Aero ToolStrip on Non-Client Area. The border and title bar stuff is called the non-client-area and even if it is possible, it is not fun to paint in there, because you have to care for a lot of stuff like activated/deactivated windows, mouse-effects and of course Windows-version specific things like Aero effects, the DWM manager, visual effects (available or not), RDP/Citrix and other remote/virtualization rendering settings, etc. Basically, everything you can draw is inside of the client area, which is the forms bounds except the borders and the title bar.
