C / C++ / MFC

STDMETHODIMP SomeClass::SomeFunction () 
{ 
    std::string tmp = "This is a std::string"; 
    AnotherFunction(); 
}
 
void SomeClass::AnotherFunction () 
{ 
    std::string tmp = "This is a std::string"; 
} 

CString myfunc()
{
    return CString(_T("a string"));
}
CString myfunc2()
{
    return CString(_T("a string2"));
}

int _tmain(void)
{
    CString tempStr(_T("hello"));
    
    tempStr.Empty();   //Do I need to call this? Or can I ormit this step?
    tempStr= myfunc();

    tempStr.Empty();
    tempStr = myfunc2();
}