Outlook Default Account

In outlook, you can have multiple internet e-mail accounts. Does anyone know the object model well enough to tell me how to set the default account through visual basic. When using automation to send messages in Visual basic, I would like to programmatically set a specific account as the default account before sending the message

I know how to get the account ID.Hope this is helpful to u!!
U can access the special folder to gain outlook express account!
Sample:list the directory under the "C:\Documents and Settings\Administrator\Local Settings\Application Data\Identities\" directory,u can get some directory name which represents outlook account ID.

Or access the register "HKEY_CURRENT_USER\Identities\" to gain the outlook user account ID..