Visual Basic - ENVIAR UN MAIL SIN QUE EL USUARIO SE DE CUENTA!!!!

HOLA!!

sOLO QUIERO SABER COMO ENVIAR UN MAIL PERO SIN QUE EL USUARIO SE DE CUENTA, POR EJEMPLO QUE ESTE DANDO CLIC EN UN BOTON PARA ASIGNAR Y EL MAIL SE ENVIE EN AUTOMATICO.

DE ANTEMANO GRACIAS

Eso era muy facil cuando existia y corria el win 95 y 98 y ME.
pero la vaina es con xp el Outlook intercepta el mensaje y dice algo assi:

UN PROGRAMA INTENTA ENVIAR CORREO NO AUTORIZADO DESEA PERMITIRLO ??

Sub SendMessage(DisplayMsg As Boolean, Optional AttachmentPath)
Dim objOutlook As Outlook.Application
Dim objOutlookMsg As Outlook.MailItem
Dim objOutlookRecip As Outlook.Recipient
Dim objOutlookAttach As Outlook.Attachment

' Create the Outlook session.
Set objOutlook = CreateObject("Outlook.Application")

' Create the message.
Set objOutlookMsg = objOutlook.CreateItem(olMailItem)

With objOutlookMsg
' Add the To recipient(s) to the message.
Set objOutlookRecip = .Recipients.Add("Nancy Davolio")
objOutlookRecip.Type = olTo

' Add the CC recipient(s) to the message.
Set objOutlookRecip = .Recipients.Add("Michael Suyama")
objOutlookRecip.Type = olCC

' Add the BCC recipient(s) to the message.
Set objOutlookRecip = .Recipients.Add("Andrew Fuller")
objOutlookRecip.Type = olBCC

' Set the Subject, Body, and Importance of the message.
.Subject = "This is an Automation test with Microsoft Outlook"
.Body = "This is the body of the message." & vbCrLf & vbCrLf
.Importance = olImportanceHigh 'High importance

' Add attachments to the message.
If Not IsMissing(AttachmentPath) Then
Set objOutlookAttach = .Attachments.Add(AttachmentPath)
End If

' Resolve each Recipient's name.
For Each ObjOutlookRecip In .Recipients
objOutlookRecip.Resolve
Next

' Should we display the message before sending?
If DisplayMsg Then
.Display
Else
.Send
End If
End With
Set objOutlook = Nothing
End Sub