正则表达式--正负整数

BOOL CheckNumValid(CString strIn)
{
	wstring szName = strIn.GetBuffer();
	strIn.ReleaseBuffer();
	std::wregex reg(L"^(([1-9]+\d*)|(0{1}))(.\d{1,2})?");
	std::wsmatch result;
	BOOL bIsValid = regex_match(szName, result, reg);
	if (!bIsValid)
	{
		msgbox(L"请输入数字！");
	}
	return bIsValid;
}