Restrict/Lock bookmarks from editing in word

The following idea is tested for Word 2010. It should work for 2007 and 2013 as well but not for 2003.

I would suggest to use ContentControls (called CC further in the text) together with Bookmarks. Next, you will need to control one event which will check if user is selecting inside any of the ContentControl. If so, we will show the message and/or move selection outside protected area.

Step 1st. Each of your bookmarks should be enclosed inside RichText ContentControl. You could do it manually for selected bookmarks or you can run the following simple code to do it for all bookmarks inside your active document.

(Important assumption! there are not any other ContentControls in your document!)

Sub Add_Bookmark_CC()

    Dim bookM As Bookmark
    For Each bookM In ActiveDocument.Bookmarks
        ActiveDocument.ContentControls.add wdContentControlRichText, bookM.Range
    Next

End Sub

2nd step. We will control one event: Document_ContentControlOnEnter. Go to ThisDocument module in your Document VBAProject and create the following event (see some comments inside the code):

Private Sub Document_ContentControlOnEnter(ByVal ContentControl As ContentControl)
    Debug.Print Now, ContentControl.Range.Bookmarks.Count

    If ContentControl.Range.Bookmarks.Count > 0 Then
        'Optional message box for user
        MsgBox "There is bookmark inside this area which you should not change. " & _
            vbNewLine & "You will be moved out of this range"

        'optionam selection change right after CC area
        Dim newPos As Long
            newPos = ContentControl.Range.End + 2
        ActiveDocument.Range(newPos, newPos).Select

    End If

End Sub

Alternative for step 1st and 2nd. If you don't want to use CC event you could add CC to each bookmarks with CC content protection. In this situation you only need 1st step and the following sub:

Sub Add_Bookmark_CC_Protected()

    Dim bookM As Bookmark
    Dim CC As ContentControl
    For Each bookM In ActiveDocument.Bookmarks
        Set CC = ActiveDocument.ContentControls.add(wdContentControlRichText, bookM.Range)
        CC.LockContents = True
    Next

End Sub

Final! As you can see there are some more possible combination of steps 1 and 2. The following code allows you to delete all CC if you need for any initial tests:

Sub Remove_All_CC()

    Dim CC As ContentControl
    For Each CC In ActiveDocument.ContentControls
        CC.Delete
    Next CC
End Sub

Protect your whole document using

'whole document readonly
ThisDocument.Protect Password:="password", NoReset:=False, Type:=wdAllowReadOnly

or

'only write in form fields (can't delete them, just fill them out)
ThisDocument.Protect Password:="mypassword", NoReset:=False, Type:=wdAllowOnlyFormFields

and now give some parts of the document free for editing:

ThisDocument.Bookmarks("myBookmark").Range.Editors.Add wdEditorEveryone
Selection.Range.Editors.Add wdEditorEveryone

---

Alternative (not tested)

don't protect your whole document, just restrict the bookmarks you want to lock

ThisDocument.Bookmarks("myBookmark").Range.Editors.Add wdEditorOwners

or

ThisDocument.Bookmarks("myBookmark").Range.Editors.Add "[email protected]"