How to use QAxWidget to realize a transparent background child UI on windows platform?

[vilas]

Hi, all !

My QAxWidget has a parent of QWidget type, the parent UI has a background, i want to use QAxWidget to realize a transparent background child UI .

Here is my code:

• ##>>
  QAxWidget *pFlash = new QAxWidget(parent);
  pFlash->resize(1280, 768);
  pFlash->setWindowFlags(windowFlags() | Qt::FramelessWindowHint);
  pFlash->setControl(QString::fromUtf8("{d27cdb6e-ae6d-11cf-96b8-444553540000}"));
  QString strFlashPath = QDir::toNativeSeparators(QApplication::applicationDirPath() + "/1012.swf");
  pFlash->dynamicCall("LoadMovie(long, string)", 0, strFlashPath);
  pFlash->dynamicCall("WMode", "Transparent");
  pFlash->dynamicCall("TotalFrames" ).toString();
  pFlash->show();

It seem that "WMode" doesn't work, so I use WinAPI:

*##
pFlash->setAttribute(Qt::WA_TranslucentBackground);
setTransparentBackground(m_pFlash, RGB(255, 255, 255));

void setTransparentBackground(QWidget *pWidget, COLORREF crKey)
{
HWND hWnd = (HWND)pWidget->winId();

//LONG lStyle = ::GetWindowLong(hWnd, GWL_STYLE);
//lStyle &= ~(WS_CAPTION | WS_THICKFRAME | WS_MINIMIZE | WS_MAXIMIZE | WS_SYSMENU);
//::SetWindowLong(hWnd, GWL_STYLE, lStyle); 

LONG lExStyle = ::GetWindowLong(hWnd, GWL_EXSTYLE);
::SetWindowLong(hWnd, GWL_EXSTYLE, lExStyle | WS_EX_TRANSPARENT/* | WS_EX_LAYERED | WS_EX_TOPMOST*/); 

typedef int (WINAPI* LPFUNC)(HWND, COLORREF , BYTE, DWORD);
HINSTANCE hInstance = ::LoadLibraryW(L"User32.DLL");
if(hInstance)
{
	LPFUNC func2 = (LPFUNC)GetProcAddress(hInstance, "SetLayeredWindowAttributes");
	if(func2)
	{  
		func2(hWnd, crKey, 0, LWA_COLORKEY);
	}

	FreeLibrary(hInstance);
}

}

But it still doesn't work. The flash still have a black background !! what can i do? Does someone know?TKS!