There is no topic generated or only some topics are created in resulting documentation, when compiling VB project.
VBdocman can create topics for all supported members in VB source code (classes, properties, methods, events, ...). User can define which of them are to be included and which not, using Compiling options dialog.
By default, only members commented with VBdocman comments are included, Non-commented check box is unchecked. Therefore, trying Vbdocman with your VB project which is not commented with VBdocman comment results in documentation with no topics.
In addition, only those types of members appear in documentation which are checked in the options. Moreover, as the last filter, only those modules from VB project are processed which are checked in the options dialog.