How to open OutlookExpress on a specific account?

My problem is simple, but i don't Know how to do it:
If i have this code on a button:

method pushButton(var eventInfo Event)
execute("C:\\Program Files\\Outlook Express\\msimn.exe", Yes,
ExeShowNormal)
endMethod
 I can open Outlook Express from Paradox, but OE is always opened on a 
default account

what I want to do is to open OE on a specific account
I don'know how to do it


i.e
Regis home account: with this e-mail regis.home@[EMAIL PROTECTED]
   login
regishome, 
password: azerty
Regis professional account      e-mail regisprof@[EMAIL PROTECTED]
      login 
regispro, password qwerty
and so on...

Any ideas how to do it
Thanks in advance
Régis