Thread: Peeking at MSMQ queues

Hi. I'm trying out the MSMQ API using VC++ v6 on NT4. I have written the following code, and I seem to be managing to both open and peek at the queue, but I don't get intelligible responses when trying to display the message label and body...

Code:

void CReadMSMQDlg::OnRead() 
{
	HRESULT hr = S_OK;
	IMSMQQueuePtr pQueue;			// The pointer to the queue (contents level)
	CString msg;

	try
	{
		IMSMQQueueInfoPtr pInfo("MSMQ.MSMQQueueInfo"); // The pointer to the queue itself

		pInfo->FormatName = "DIRECT=TCP:IPAddress\\QName";

		// Open the queue for receive access
		pQueue = pInfo->Open( MQ_PEEK_ACCESS, MQ_DENY_NONE );

		IMSMQMessagePtr pMsg("MSMQ.MSMQMessage");

		_variant_t vtTimeOut((long)1000);  // 1 second until receive time-out
		_variant_t bvtWantBody((bool)true); // Set to retrieve message body

		// Read all the messages in queue until 1 second time-out
		for( ;; )
		{
			pMsg = pQueue->Peek( &vtMissing, &bvtWantBody, &vtTimeOut );

			if( pMsg == NULL )
			{
				msg.Format( "No messages on %s", pInfo->FormatName );
				MessageBox( msg, NULL, MB_OK );
				pQueue->Close();
				pQueue = NULL;
				break;
			}

			// Display the message label and body
			msg.Format( "%s", pMsg->Label );
			//msg.Format( "%s", pMsg->Body );

			MessageBox( "DEBUG Label", msg, MB_OK );
		}
	}
	catch( const _com_error& comerr )
	{
		hr = comerr.Error();
		msg.Format( "Error Code = 0x%X", hr );
		MessageBox( msg, "COM ERR", MB_OK );
		
		msg.Format( "Error Description = %s", (WCHAR *)comerr.Description() );
		MessageBox( msg, "COM ERR", MB_OK );		

		if( pQueue )
			pQueue->Close();
	}
}

From looking on MSDN, Label is supposed to be a string, but it doesn't display the message label I'd expect, and is just showing rubbish really. Also, MSDN says that the body variable is a 'variant', does anybody know how too handle this data type?

Thanks.

All my problems solved.

Thankyou.