Programmatically perform actions when an email message is received

Outlook.NameSpace outlookNameSpace;
Outlook.MAPIFolder inbox;
Outlook.Items items;

private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
    outlookNameSpace = this.Application.GetNamespace("MAPI");
    inbox = outlookNameSpace.GetDefaultFolder(
            Microsoft.Office.Interop.Outlook.
            OlDefaultFolders.olFolderInbox);

    items = inbox.Items;
    items.ItemAdd +=
        new Outlook.ItemsEvents_ItemAddEventHandler(items_ItemAdd);
}

void items_ItemAdd(object Item)
{
    string filter = "USED CARS";
    Outlook.MailItem mail = (Outlook.MailItem)Item;
    if (Item != null)
    {
        if (mail.MessageClass == "IPM.Note" &&
                   mail.Subject.ToUpper().Contains(filter.ToUpper()))
        {
            mail.Move(outlookNameSpace.GetDefaultFolder(
                Microsoft.Office.Interop.Outlook.
                OlDefaultFolders.olFolderJunk));
        }
    }

}

Dim outlookNameSpace As Outlook.NameSpace
Dim inbox As Outlook.MAPIFolder
Dim WithEvents items As Outlook.Items

Private Sub ThisAddIn_Startup() Handles Me.Startup

    outlookNameSpace = Me.Application.GetNamespace("MAPI")
    inbox = _
        outlookNameSpace.GetDefaultFolder( _
        Outlook.OlDefaultFolders.olFolderInbox)
    items = inbox.Items

End Sub

Private Sub Items_ItemAdd(ByVal item As Object) Handles items.ItemAdd
    Dim filter As String = "USED CARS"
    If TypeOf (item) Is Outlook.MailItem Then
        Dim mail As Outlook.MailItem = item
        If mail.MessageClass = "IPM.Note" And _
 mail.Subject.ToUpper.Contains(filter.ToUpper) Then
            mail.Move(outlookNameSpace.GetDefaultFolder( _
                Outlook.OlDefaultFolders.olFolderJunk))
        End If
    End If

End Sub