C / C++ / MFC

string MapiAttachment::GetPropUNICODE(LONG PropertyID, UINT codePage = 0)
{
	string pRetVal;
	if ((PROP_TYPE_MASK & PropertyID) != PT_UNICODE)
	{
		return 0;
	}	
	wstring pTemp;
	HRESULT hrProperty;	
	
	LPSPropValue lpPropValue = NULL;

	hrProperty = HrGetOneProp((LPMAPIPROP)m_Attachment, PropertyID, &lpPropValue);
	if (hrProperty == S_OK)
	{			
		//see how many bytes is needed
		int len = WideCharToMultiByte(codePage , 0, (const wchar_t *)lpPropValue[0].Value.lpszW, -1,0, 0, NULL, NULL );		
		
		LPSTR pTemp;		
		MAPIAllocateBuffer(len,(LPVOID *)&pTemp);		
		WideCharToMultiByte(codePage , 0, (const wchar_t *)lpPropValue[0].Value.lpszW, -1,pTemp, len, NULL, NULL );		
		
		pRetVal = pTemp;
		MAPIFreeBuffer(pTemp);
		return (pRetVal);

	}	
	else 
	{
		pRetVal = ("");
		return (pRetVal);
	}	
}