You may only load or create projects with two modules (Forms, MDI Forms, Modules, Classes) in the Visual Basic Working Model. Projects may contain an unlimited (system dependant) number of modules in full versions of Visual Basic.

The Visual Basic Working Model allows only two modules (Forms, MDI Forms, Modules, Classes) for each project. In order to increase the capacity of your Visual Basic projects, you must purchase a full version of Visual Basic, such as the Professional or Enterprise version.