// ---------------
#region TrackingForegroundWindowChange
public static IntPtr StartTrackingForegroundWindowChange(Action onWindowChangeAction, out GCHandle gcHandle)
{
WinEventDelegate action = (hook, type, hwnd, idObject, child, thread, time) =>
{
onWindowChangeAction.Invoke();
};
gcHandle = GCHandle.Alloc(action);
return(WinAPIDeclarations.SetWinEventHook((uint)Event.EVENT_SYSTEM_FOREGROUND,
(uint)Event.EVENT_SYSTEM_FOREGROUND, IntPtr.Zero, action, 0, 0, (uint)Event.WINEVENT_OUTOFCONTEXT));
}
public static extern IntPtr SetWinEventHook(uint eventMin, uint eventMax,
IntPtr hmodWinEventProc, WinEventDelegate lpfnWinEventProc, uint idProcess, uint idThread, uint dwFlags);
