Word VBA macro to insert file and merge formatting - vba

Question

I have a template with a header/footer and text formatting. I would like to write a macro to fill this template with the contents of an .rtf or .doc file. Also, I would like to merge the formatting so that I keep the header and formatting from the template file, and the pictures in the .rtf or .doc files.
Cut-and-paste works great. If I open and save the template file, open the file to insert, select all, and paste special with "merge formatting", then I get exactly what I want. I just want a more scalable solution.
I wrote a macro that does most of this, but it fails to merge the formatting and drops (or hides) the header and footer. I thought the correct approach would use the InsertFile method, but I can't figure it out.
Any pointers would be appreciated (I'm new to both Word and VBA).
Sub InsertFile()
currentPath = ActiveDocument.Path
Set FileBox = Application.FileDialog(msoFileDialogFilePicker)
With FileBox
.Title = "Select the File that you want to insert"
.InitialFileName = currentPath & "\" & "*.rtf"
.AllowMultiSelect = False
If .Show = -1 Then
FiletoInsert = .SelectedItems(1)
End If
End With
Selection.Range.InsertFile FiletoInsert
Set FileBox = Nothing
End Sub
Update - I also tried this approach, which seems to use cut-and-paste, but the results are the same.

Answer 1

Here's the best that I can do. It pastes as plain text, but that's better than nothing (or pasting with original formatting).
Sub InsertFile()
' inserts selected file into current document (strips formatting)
With Application.FileDialog(msoFileDialogFilePicker)
.AllowMultiSelect = False
.Title = "Select the File that you want to insert"
.Show
FiletoInsert = .SelectedItems(1)
End With
' get content from my file
Application.Documents.Open (FiletoInsert)
Application.Selection.WholeStory
Application.Selection.Copy
Application.ActiveWindow.Close
' paste without formatting
Application.Selection.PasteSpecial DataType:=wdPasteText
End Sub

Answer 2

Sub InsertFile()
' inserts selected file into current document (strips formatting)
With Application.FileDialog(msoFileDialogFilePicker)
.AllowMultiSelect = False
.Title = "Select the File that you want to insert"
.Show
FiletoInsert = .SelectedItems(1)
End With
Selection.InsertFile FileName:=FiletoInsert, Range:="", _
ConfirmConversions:=False, Link:=False, Attachment:=False
End Sub

Answer 3

I've tried this same call in my own VBA macro, and find that
Selection.Range.InsertFile (FiletoInsert)
Seems to work when I only pass the one parameter filename. Make sure the filename is complete.