✅ Z position controlling of my WPF window

Hello, guys, i'm developing a WPF application for a game, which source code I don't have. I want to make a window, that always will be on top of the game window, but if there is a some other window, for example browser, it can be on top of my application. I have one idea to use C++ functions for windows from user32.dll, but it looks complicated and I think there is a simpler solution. Is it?