How to apply WithEvents on newly received mail? - vba

Question

I'm trying to modify incoming emails in a specific folder and send it to another person.
The part modify/send works.
The script doesn't work when there is new email. It only works when I transfer it to myself.
The beginning of the code:
Private WithEvents Items As Outlook.Items
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).Folders("DI").Items
End Sub
Private Sub Items_ItemAdd(ByVal item As Object)
Dim Msg As Outlook.MailItem
If TypeName(item) = "MailItem" Then
Set Msg = item

Answer 1

Did you restart your Outlook? Please refer to the following code:
Private WithEvents Items As Outlook.Items
Private Sub Application_Startup()
Dim olApp As Outlook.Application
Set olApp = Outlook.Application
Set Items = GetNS(olApp).GetDefaultFolder(olFolderInbox).Folders("Stuff").Items
End Sub
Private Sub Items_ItemAdd(ByVal item As Object)
On Error GoTo ErrorHandler
MsgBox "You moved an item into the 'Stuff' folder."
ProgramExit:
Exit Sub
ErrorHandler:
MsgBox Err.Number & " - " & Err.Description
Resume ProgramExit
End Sub
Function GetNS(ByRef app As Outlook.Application) As Outlook.NameSpace
Set GetNS = app.GetNamespace("MAPI")
End Function
Here is a link: VBA Outlook event moving email