Moving Outlook message with specific subject to Subfolders - vba

Question

I am trying to write a brief VBA script that will move incoming messages from my Outlook Inbox to a subfolder. This is what I currently have (assembled from various posts), but I'm not getting any result when I send test emails. If there are any other posts that would relate to this, I would appreciate it!
Private Sub Application_Startup()
Dim olApp As Outlook.Application
Dim objNS As Outlook.NameSpace
Set olApp = Outlook.Application
Set objNS = olApp.GetNamespace("MAPI")
' Default local Inbox
Set Items = objNS.GetDefaultFolder(olFolderInbox).Items
End Sub
Private Sub Items_ItemAdd(ByVal item As Object)
On Error GoTo ErrorHandler
Dim Msg As Outlook.MailItem
Set myInbox = GetNamespace("MAPI").GetDefaultFolder(olFolderInbox)
If TypeName(item) = "MailItem" Then
Set Msg = item
If Msg.SenderEmailAddress = "name#example.com" Then
If InStr(0, Msg.Subject, "Subject Title", vbTextCompare) > 0 Then
Msg.Move myInbox.Folders("Test").Subfolder("Destination")
End If
End If
End If
ProgramExit:
Exit Sub
ErrorHandler:
MsgBox Err.Number & " - " & Err.Description
Resume ProgramExit
End Sub

Answer 1

It looks like you didn't define and initialize the Items object properly. For example:
Public WithEvents myOlItems As Outlook.Items
Public Sub Initialize_handler()
Set myOlItems = Application.GetNamespace("MAPI").GetDefaultFolder(olFolderContacts).Items
End Sub
Private Sub myOlItems_ItemAdd(ByVal Item As Object)
' do something here
End Sub
Be aware, the ItemAdd event is not fired when more than 16 items is added at the same time. This is a known issue in the OOM.
Try to use the NewMailEx event of the Application class instead. And I'd suggest reading the following series of articles:
Outlook NewMail event unleashed: the challenge (NewMail, NewMailEx, ItemAdd)
Outlook NewMail event: solution options
Outlook NewMail event and Extended MAPI: C# example
Outlook NewMail unleashed: writing a working solution (C# example)
Finally, is your macro enabled in Outlook? Have you checked out the Trust center settings?

Answer 2

Put your code in ThisOutlookSession.
Just above your code put
Public WithEvents Items As Items
When using the built-in class module ThisOutlookSession, Sub Application_Startup() initializes the handler.