Bringing Window to the Front in C# using Win32 API

Question

SetForegroundWindow is supposed to steal focus and there are certain cases where it will fail.

The SetForegroundWindow function puts the thread that created the specified window into the foreground and activates the window. Keyboard input is directed to the window

Try capturing the focus with SetCapture prior to making the call. Also look into different ways of bringing the window to the front: SetForeGroundWindow, SetActiveWindow, even simulating a mouse click can do this.

What is the difference between SetForeGroundWindow, SetActiveWindow, and BringWindowToTop? It appears as if they all do the same thing.

According to MSDN, SetForeGroundWindow will activate the window and direct keyboard focus to it. This attempts to work even when your process is in the background. SetActiveWindow does the same thing as SetForeGroundWindow, but it doesn't do anything if your application isn't the frontmost application. Finally, BringWindowToTop only brings the window to the top, and doesn't change the keyboard focus.

You can try the BringWindowToTop function to not steal focus. I haven't used it, but it seems to be what you're looking for.

Have you tried using SetWindowPos. This is the canonical function for moving, resizing and setting z-order in Windows. There is a SWP_NOACTIVATE flag you can use. Look at http://msdn.microsoft.com/en-us/library/ms633545(VS.85).aspx. I have not tried this on a window belonging to another process, but it is probably worth a try.

SetWindowPos + SWP_NOACTIVATE does the job.