protected override void WndProc(ref System.Windows.Forms.Message m) { if (m.Msg == Cliver.WinApi.Messages.WM_WTSSESSION_CHANGE) { //SessionEventHandler?.BeginInvoke(m.WParam.ToInt32(), null, null); SessionEventHandler?.Invoke(m.WParam.ToInt32()); } base.WndProc(ref m); }