native window with qt::popup style parent window no work,

in the controllerwindow.cpp, the two line code

HWND hwnd = CreateWindowEx(WS_EX_NOACTIVATE, L"BUTTON", L"xx", HWND hwnd = CreateWindowEx(WS_EX_NOACTIVATE, L"BUTTON", L"xx", BS_PUSHBUTTON | WS_CHILD, 0, 0, 100, 100, (HWND)previewWindow->winId(), NULL, NULL, NULL); ShowWindow(hwnd, SW_SHOWNOACTIVATE);

don;t work well, the button didn't have message process

see the demo,