IEmailVerifier is the dual-interface. So, you can use AMV through disp-interface (Visual Basic, JavaScript, ASP) or through vtbl-interface (Microsoft Visual C++, Borland Delphi). Please, see code samples for both methods illustrations.
Note, that you can create many verifier objects and implement multi-threaded verifying in your application. AMV has no built-in limitation for number of created objects. All objects will verify emails according current AMV settings. Also, you can configure AMV (e.g. DNS, proxy, SMTP settings) through COM interfaces of AMV.
Standard C++ header file for interface you can found in file: COM\AmvCpp1\AmvInterfaces.h in subdirectory of Advanced Maillist Verify.
See also: IEmailVerifier interface methods, Information for programers