>How do you differentiate between real "Visible Windows" and "Hidden Windows", and also between "Real Windows" and "Other Objects" like menu's, buttons, etc.
>
>I need to compile a list of application windows, but not all their individual componenet object.

You can check Class of the window http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/windowclasses/aboutwindow.asp and its Style http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/WindowsUserInterface/Windowing/Windows/WindowReference/WindowStyles.asp