Control game windows in c/c++?

[SimonJ9]

Hi everyone,

I'm building an arcade cabinet with Linux Mint. I have several games made with Unity3D and I would like to let the games take control over the system, because the players are not supposed to access anything else except the games (with a button panel).

I have a custom library written in C, and I want to let it control the game windows. For example, there is a game selection window, and an actual game window. The game window must always stay on the top, and minimizes the game selection window when the game starts. What library should I use? I did some research and I found most answers are saying that the game should let the users control these features, which is not the case here. Could anyone point me to some direction? Any help is appreciated.