Hi,
I have tried the following code, and it works.
CoInitialize(NULL);
{
	OriginApp::IOApplicationPtr pOrigin = NULL;
	pOrigin.CreateInstance(__uuidof(ApplicationSI));
	pOrigin->Visible = OriginApp::MAINWND_VISIBLE::MAINWND_SHOW;
	OriginApp::WorksheetPagesPtr wksPagesPtr;
	OriginApp::WorksheetPagePtr wksPagePtr;
	wksPagesPtr = pOrigin->WorksheetPages;
	int nCount = wksPagesPtr->Count;
	for(long i = 0; i < wksPagesPtr->GetCount(); i++)
	{
		wksPagePtr = wksPagesPtr->GetItem(i);
		cout << wksPagePtr->GetName();
	}
}
CoUninitialize();
Penn