Mi Mark,

I have just started learning how to use/write macros and so cannot tell you
if it is possible to have a macro automatically access each file in your
solution.  You can however, write your own macro to do the same thing.  My
solution contains a single project and the subroutine/macro shown below
illustrates how to list all files in the solution/project files in the IDE
output window.   Hope this helps.

Ian

Sub viewFilesInCurrentProject()
   Dim oProjectItems As ProjectItems =
DTE.ActiveSolutionProjects(0).ProjectItems
   Dim oItem As ProjectItem
   For Each oItem In oProjectItems
         Dim oFilename As String = oItem.Name()
         Debug.WriteLine("file name = " + oFilename)

         Dim oFilePath as String = oItem.Filenames(1)
         Debug.WriteLine("file path= " + oFilename)

         ' call yourSubroutine( oFilename )
   Next
End Sub