protected void Flashing(bool enable) { var info = new Win32.FLASHWINFO(); info.cbSize = Convert.ToUInt32(Marshal.SizeOf(info)); info.hwnd = this.Handle; info.dwFlags = enable ? Win32.FLASHW_TRAY : Win32.FLASHW_STOP; info.uCount = UInt32.MaxValue; info.dwTimeout = 0; Win32.FlashWindowEx(ref info); _isBlinking = enable; }