MAPI error handling

[tsd_man]

Hi folks can someone help with a little problem about sending emails from vb6 via outlook etc. the following code is the main extract from my code. The process works ok providing OK/YES is selected at each of the dialogs
1. 'profile not valid/enter valid name' (OK and use default)
2. a program is trying to send emails (OK these)
etc etc

and proceeding through BUT if the user selects the CANCEL button at any time i get login failure error(s) code 32003

can someone please show me how to trap this error?

Dim objUser As COO.clsUser
Dim strTemp As String
Dim strSubFuncName As String
Dim strEmailAttached As String
Dim strEmailGuid As String
 
strSubFuncName = "frmMain:MailSession"
On Error GoTo ErrHandler
 
MailSession = False
strEmailAttached = ComputerName
Set objUser = New COO.clsUser
objUser.GetData
 
MAPISession.NewSession = True
MAPISession.UserName = GetCurrentUser
MAPISession.Password = ""
MAPISession.LogonUI = True
MAPISession.SignOn
MAPIMessages.SessionID = MAPISession.SessionID
MAPIMessages.Compose
MAPIMessages.MsgIndex = -1
MAPIMessages.RecipDisplayName = objUser.RecipientName
MAPIMessages.RecipAddress = objUser.RecipientAddress
MAPIMessages.AddressResolveUI = False
MAPIMessages.ResolveName
strEmailGuid = mstrGUID
'the companyname and companycode fields are the form's static fields
strTemp = "EORDER: " & txtCompanyName.Text & " (" & txtCompanyCode.Text & ") ID: " & strEmailGuid
MAPIMessages.MsgSubject = strTemp
MAPIMessages.MsgNoteText = "Order"
MAPIMessages.AttachmentPathName = App.Path & "\" & strEmailAttached & ".xml"
MAPIMessages.send False
MailSession = True
Exit Function
ErrHandler:
    ErrorHandling strSubFuncName, Err.Number, Err.Description, Err.Source
    MailSession = False
End Function

Edit: Added [vbcode][/vbcode] tags for clairty. - Hack