Developers often work with multiple projects simultaneously. The two most common
reasons to group projects together are
The projects depend on each other (such as an application and an ActiveX control
that it uses).
The projects are multiple, independent parts of a large development project
(such as an order-entry system and an HR application both being built for the
Project groups have become necessary because each Visual Basic project does
not exist in a vacuum, but rather must coexist with other applications. As the
software industry continues to mature, you will see more and more development
with multiple, interdependent projects.
Project groups provide several benefits over the more traditional singleproject
All the individual projects you have placed into a group are opened and closed
together, reducing the time spent getting ready to work and the time getting ready
Opening all the projects together enables you to work with them inside a single
instance of Visual Basic.
If the projects are directly related (through references), you can execute
and debug them together (as discussed in more detail in the section titled "Using
Project Groups to Debug an ActiveX DLL").
The individual projects are not modified just by being part of a project group.
They are still stored individually on disk. The group file (*.VBG) merely contains
links (using relative paths) to each member project (*.VBP). The contents of a
sample *.VBG group file are shown here:
Each project can belong to a number of groups, in combination with other projects,
and can still be opened directly, as an individual project, at any time. The only
limit on combining projects is that a project can only be in a project group once;
multiple copies of a given project within the same project group are not possible.
Creating Project Groups
Building Multiple Projects