Use Qt in ATL COM on Windows

[Muffin]

Hi
Is there any one that have tried to use Qt (with Gui) together with COM?
and if so where have you placed the QApplication part?

I have it within a function i an interface of the COM class like this:

STDMETHODIMP CRGraph::GraphRun(CHAR* inData, CHAR* outResult)
{
	// TODO: Add your implementation code here
	int argc;
	char *argv;
	QApplication app(argc,&argv);
	QMessageBox msgBox;
	msgBox.setStandardButtons(QMessageBox::Yes | QMessageBox::No);
	msgBox.show();
	app.exec();
	return S_OK;
}

STDMETHODIMP CRGraph::GraphRun(CHAR* inData, CHAR* outResult)
{
	// TODO: Add your implementation code here
	int argc;
	char *argv;
	QApplication app(argc,&argv);
	QMessageBox msgBox;
	msgBox.setStandardButtons(QMessageBox::Yes | QMessageBox::No);
	msgBox.show();
	app.exec();
	return S_OK;
}

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the problem is that nothing shows and i'm not shure how to proceed.