I have collected a series of tips and answers to common questions. If you know of any other that should be here, let su know.
Chat window - This explains the common mistakes, the incorrect and the correct way to do scrolling chat windows.
Dragging windows - So, you want to drag a window without using the real title bar?
End - Ever wondered why your application doesn't shutdown cleanly?
File I/O - This tips explains most reliable (and simple) way of doing File I/O.