When I create a Plus window with MsgPlus.CreateWnd, it has no real Window Border, just the one drawn by Patchou's design engine. Likewise, it never enables the real Window Minimize, Maximize and/or Close buttons, but Patchou's "fake" buttons matching his Window styles. Now, how can I use the Windows API to enable the real window borders and titlebar/caption, as well as the real Min Max Close buttons? I would be able to take care to hide Patchou's Min Max Close so there wouldn't be a copy of them. I have already read about the SetWindowLongW function, but did not actually succeed in using it to enable/disable the window borders or show/hide the Windows Themed titlebar in Plus Windows created by MsgPlus.CreateWnd. So, how to accomplish this?

http://msdn.microsoft.com/en-us/library/czada357.aspx

You will have to use GetWindowLong and SetWindowLong and remove WS_DLGFRAME and add WS_CAPTION if I am not mistaken.