This is the source repository for
High Performance Excel: Object-Oriented, Class-Based Solutions with Visual Basic for Applications
Open the sources folder and download (or download directly from the following link):
If you receive the following when running this on Excel for Mac 2011:
Compile error: Can't find project or library
Open Tools -> References...
Look for MISSING: ctv OLE Control module
Uncheck the item, click OK, then Debug -> Compile VBAProject