static void UnsubscribeFromWindowActivationEvents()
{
if (windowActivationHookHandle == 0)
{
return;
}
int result = Win.UnhookWinEvent(windowActivationHookHandle);
windowActivationHookHandle = 0;
windowActivationDelegate = null;
HandleAnyErrors(result);
}
static void SubscribeToWindowActivationEvents()
{
if (windowActivationHookHandle != 0)
{
return;
}
windowActivationDelegate = WinEventProc;
windowActivationHookHandle = Win.SetWinEventHook(Win.EVENT_SYSTEM_FOREGROUND, Win.EVENT_SYSTEM_FOREGROUND, IntPtr.Zero, windowActivationDelegate, 0, 0, Win.WINEVENT_OUTOFCONTEXT);
HandleAnyErrors(windowActivationHookHandle);
}