Check full screen Addy
crossfire.exe+2A9078
0 = lobby
1 = Ingame (Fullscreen)

0 = lobby
1 = Ingame (Fullscreen)





DWORD crossfire =(DWORD)GetModuleHandleA("crossfire.exe");
DWORD screen =*(DWORD*)(crossfire+0x2A9078);
*(float*)(screen) = 1 or 0;