VBA Detect if an e-mail in editing mode has a signature included?

Question

I'm trying to add a signature but ensure that no other signature can be added after it. My method of adding it is basically concatenating the HTMLBody and a custom HTML-based signature.

As background, when I start writing an Outlook e-mail, I can attach a signature to it using Message → Include → Signature and picking the signature I need. However, no matter how many times I pick a signature, I won't get duplicates.

How does Outlook detects that a signature has been included? Is it a property under the MailItem object or the Inspector?

Thanks,

Answer 1

There is a bookmark when a user applies a signature.

Option Explicit

Private Sub signatureText()

Dim newEmail As mailItem
Dim olInsp As Inspector

Dim wdDoc As Object
Dim oRng As Object
Dim oBookmark As Object

Dim sigText As String

Set newEmail = CreateItem(olMailItem)
    
With newEmail

    Set olInsp = .GetInspector
    Set wdDoc = olInsp.WordEditor
    Set oRng = wdDoc.Range
    
    ' Default signature
    ' or set a breakpoint to manually add a signature
    .Display
    
    If wdDoc.Bookmarks.Exists("_MailAutoSig") Then
        Set oBookmark = wdDoc.Bookmarks("_MailAutoSig")
        
        sigText = oBookmark.Range.Text
        
        Debug.Print oBookmark.Range.Text
        MsgBox "Please do not add your own signature."
        
    Else
        Debug.Print "No signature bookmark."
    End If
    
End With
    
End Sub