Create a window using the WS_EX_NOACTIVATE flag ,but it can't be dragged until I release the mouse

Question

I have created a window using the WS_EX_NOACTIVATE flag and it works great as far as not taking focus when you click the window. However when I drag the window or try to resize

Answer 1

If you need a window that doesn't take focus when clicked, but can still be interacted with, you need to handle the WM_MOUSEACTIVATE, and return MA_NOACTIVATE.

Additional information and fully working sample code has been published by Raymond Chen. See How can I have a window that rejects activation but still receives pointer input?