How to Automatically Move an Email to a Folder if it Contains 10 digits in the subject line - vba

Question

I would like to make it so if an email comes in with a phone number in the subject line (so 10 numerical digits) then the system automatically moves it to a folder called "Texting."
User Reidacus asked a very similar question here:
Move incoming mail to folders with RegEx in a rule
But I can't get it to work for me. When the email comes in it just sits in my inbox. I am very new the VBA and (sorry), I don't have a clue what I'm doing. Do I need to install anything special into my system to get this to work?
Here is my adapted code (note: in the real code I have my real email address)
Sub filter(Item As Outlook.MailItem)
Dim ns As Outlook.NameSpace
Dim MailDest As Outlook.Folder
Set ns = Application.GetNamespace("MAPI")
Set Reg1 = CreateObject("VBScript.RegExp")
Reg1.Global = True
Reg1.Pattern = "([\d][\d][\d][\d][\d][\d][\d][\d][\d][\d])"
If Reg1.Test(Item.Subject) Then
Set MailDest = ns.Folders("firstname.lastname#email.ca").Folders("Inbox").Folders("Texting")
Item.Move MailDest
End If
End Sub

Answer 1

In order for your Sub Filter to run everytime a new emails comes in, you need to add an "event listener", by adding the code below to the ThisOutlookSession module (this code is taken from home, here on SO : How do I trigger a macro to run after a new mail is received in Outlook? )
In order for this code to take affect, you must Restart Outlook.
ThisOutlookSession Module 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")
' get 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
If TypeName(item) = "MailItem" Then
Set Msg = item
' Call your custom-made Filter Sub
Call filterNewMail_TenDig(item)
End If
ProgramExit:
Exit Sub
ErrorHandler:
MsgBox Err.Number & " - " & Err.Description
Resume ProgramExit
End Sub
Now, you only need to make the following modifications to your Module code. Using ns.GetDefaultFolder(olFolderInbox) will get you the default "Inbox" folder for the current profile (read here at MSDN link ).
Sub filterNewMail_TenDig Code
Sub filterNewMail_TenDig(item As Outlook.MailItem)
Dim ns As Outlook.NameSpace
Dim MailDest As Outlook.Folder
Set ns = Outlook.Application.GetNamespace("MAPI")
Set reg1 = CreateObject("VBScript.RegExp")
With reg1
.Global = True
.IgnoreCase = True
.Pattern = "\d{10,10}" ' Match any set of 10 digits
End With
If reg1.Test(item.Subject) Then
Set MailDest = ns.GetDefaultFolder(olFolderInbox).Folders("Texting")
item.Move MailDest
End If
End Sub