private bool ClickOkButton(IntPtr hwnd) { // for debugging var info = new NativeWindowCalls.WINDOWINFO(); info.cbSize = (uint)Marshal.SizeOf(info); NativeWindowCalls.GetWindowInfo(hwnd, ref info); string titleCheck = NativeWindowCalls.GetWindowText(hwnd); // verify if (hwnd != IntPtr.Zero) { // click ok NativeWindowCalls.SendMessage(hwnd, NativeWindowCalls.WmActivate, NativeWindowCalls.MaActivate, 0); NativeWindowCalls.SendMessage(hwnd, NativeWindowCalls.BtnClick, 0, 0); return(true); } return(false); }