Crosshair won't stay on top of certain windows (DirectX game)

[aparis2002]

As long as the Python script is run before my game, it will show on top of it (QtCore.Qt.WindowStaysOnTopHint).
However, if I Alt-Tab out of the game and come back to it, or if I start the game before the Python script, the crosshair will not show on the game (It will show on top of all other windows, but not the game).
Is there any option to make the window stay on top of absolutely everything until stopped?

[SparrowOchon]

Try running your game in borderless or windowed mode.