get ie hwnd

getIeHandle

// level: IE窗口的层级，一共三级
// 0: Shell Embedding
// 1: Shell DocObject View
// 2: Internet Explorer_Server
HWND getIEHandle(QAxWidget* pWidget, int level)
{
	assert(pWidget);
	CComPtr<IWebBrowser2> pWebBrowser2;
	pWidget->queryInterface( IID_IWebBrowser2, (void**)&pWebBrowser2 );
	assert(pWebBrowser2);
	
	CComPtr<IServiceProvider> pServiceProvider;
	// 1.|--Shell Embedding
	if (SUCCEEDED(pWebBrowser2->QueryInterface(IID_IServiceProvider,
		(void **)&pServiceProvider)))
	{
		CComPtr<IOleWindow> pWindow;
		if (SUCCEEDED(pServiceProvider->QueryService(
			SID_SShellBrowser, IID_IOleWindow, (void **)&pWindow)))
		{
			HWND hwndBrowser = NULL;
			if (SUCCEEDED(pWindow->GetWindow(&hwndBrowser)))
			{
				if (level == 0)
				{
					return hwndBrowser;
				}
				// 2.|--Shell DocObject View
				HWND hchildwnd = ::GetWindow(hwndBrowser, GW_CHILD);
				while (hchildwnd) 
				{
					TCHAR wndname[MAX_PATH] = {0};
					::GetClassName(hchildwnd, wndname, MAX_PATH);
					if (wcscmp(wndname, L"Shell DocObject View") == 0) 
					{
						if (level == 1)
						{
							return hchildwnd;
						}
						// 3.|--Internet Explorer_Server
						HWND hiewnd = ::GetWindow(hchildwnd, GW_CHILD);
						while (hiewnd) 
						{
							TCHAR wndname[MAX_PATH] = {0};
							::GetClassName(hiewnd, wndname, MAX_PATH);
							if (wcscmp(wndname, L"Internet Explorer_Server") == 0) 
							{
								return hiewnd;
							}
							hiewnd = ::GetNextWindow(hiewnd, GW_HWNDNEXT);
						}

						return NULL;
						
					}
					hchildwnd = ::GetNextWindow(hchildwnd, GW_HWNDNEXT);
				}
				return NULL;
			}
		}
	}

	return NULL;
}