Question

I need to detect if some application is currently running in full screen mode. If yes, then I must stop my application. So, how can I detect that?
p.s. Win32 C++

Answer 1

hWnd = GetForegroundWindow();
RECT appBounds;
RECT rc;
GetWindowRect(GetDesktopWindow(), &rc);

Then check if that windows isn’t desktop or shell.
Simple if instruction.

if(hWnd =! GetDesktopWindow() && hWnd != GetShellWindow())
{
    GetWindowRect(hWnd, &appBounds);
    // Now you just have to compare rc to appBounds
}

This is written without testing.