If you need to build a series of Visual Studio solutions, then you need a build tool.
The two most commonly used in the .NET world are
- MSBuild (reference: http://msdn.microsoft.com/en-us/library/dd393574.aspx)
- Nant (reference: http://nant.sourceforge.net/)
(It’s not clear what you’re asking, you may wish to clarify or give an example.)