[Resolved]Current window active?

[Account]

Hi there, I have a (difficult) question:

I use sendkeys for enter cheats in a game.
And use hotkeys witch work ine very window.
Now I want to make this:

If i am in my game, so game-screen is active, and I hit my hotkey that it checks if my game, for exmaple. mygame.exe is the active window.

So is my game.exe the active window then Sendkeys else msgbox "Start up your game"

Maybe its easy,maybe not,

I thank u