Function AddFromFile ( _
    FileName As String _
) As ProjectItem

Dim instance As ProjectItems
Dim FileName As String
Dim returnValue As ProjectItem

returnValue = instance.AddFromFile(FileName)

ProjectItem AddFromFile(
    string FileName
)

ProjectItem^ AddFromFile(
    [InAttribute] String^ FileName
)

function AddFromFile(
    FileName : String
) : ProjectItem

Sub AddFromFileExample()
   ' This function creates a solution and adds a Visual Basic Console
   ' project to it. 
   Dim soln As Solution
   Dim proj As Project
   Dim projitems As ProjectItems

   ' Create a reference to the solution.
   soln = DTE.Solution

   ' Create a new solution.
   soln.Create("c:\temp2", "MyNewSolution")

   ' Create a new Visual Basic Console application project.
   ' Adjust the save path as needed.
   proj = soln.AddFromTemplate("C:\Program Files\Microsoft Visual Studio .NET\Vb7\VBWizards\ConsoleApplication\Templates\1033\ConsoleApplication.vbproj", "c:\temp2", "My New Project", True)
   projitems = proj.ProjectItems

   ' Add a project item from a file.
   projitems.AddFromFile("C:\temp\An Item.bas")
End Sub