error: name followed by '::' must be a class or namespace name

Question

I'm trying to build my first ATL DLL project, in which I'm using ADODB. The issue here is that I'm getting each ADODB class underlined

ADODB::_ConnectionPtr spADOConnection;

when I pass the mouse over on ADODB::_ConnectionPtr I get name followed by '::' must be a class or namespace name spADOConnection I get expected a ';'. What's the mean of this, please? How do I to fix it please?

Thanks a lot!

Answer 1

The compiler is unable to locate the declaration of ADODB. Make sure you include the relevant header in the translation unit where the compiler complains.