C / C++ / MFC

LRESULT CListBoxDlg::OnBnClickedBtngetselitems(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
{
	LPCTSTR sTitle;			// Message box title
	int arrSelList[12];		// Message buffer
	TCHAR pszBuf[128] = "";// Message buffer
	int iMaxNum = 12;		// Max number of selected items
	LRESULT iSelCount = 0;	// Total selected items in the list
	LPCTSTR sMsg = 0;		// Message to put in the message box
	CComBSTR bsMessage;		// Message accumulator

	iSelCount = this->SendDlgItemMessage(IDC_AVSCODES, LB_GETSELITEMS, WPARAM(iMaxNum), LPARAM(arrSelList));

	if (iSelCount != LB_ERR) {

		bsMessage.Append("You have selected the fields: ");
		_stprintf(pszBuf, "%li", arrSelList[0]);
		bsMessage.Append(pszBuf);

		for (int i = 1; i < iSelCount; i++) {

			bsMessage.Append(", ");
			_stprintf(pszBuf, "%li", arrSelList[i]);
			bsMessage.Append(pszBuf);
		}
		bsMessage.Append(".");
		/* The following line will fails if bsMessage.m_str contains:
			"You have selected the fields: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11."
		   But will not fail if it bsMessage.m_str contains:
			"You have selected the fields: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10."
			(4 caracter less) but long size is not suppose the cause problems
			with ATL 7.0 compared to ATL 3.0
		*/
		sMsg = CW2CT(bsMessage.m_str);
		/*
		// The following two lines makes it work fine but USES_CONVERSION is not supposed
		// to be needed with ATL 7.0
		USES_CONVERSION;
		sMsg = W2CT(bsMessage.m_str);*/
		sTitle = _T("Selected Items List");
		::MessageBox(this->m_hWnd, sMsg, sTitle, MB_OK);
	}

	return 0;
}