Ras dial up and the Network Logon dialog

I have a program that is able to successfully collect phone number and
user/password/domain information and create a RAS connection.


My only irritation is that if any of the login information is
incorrect(username, password, or domain), a "Network Log On" dialog
will be displayed. This allows the user 2 more chances to "correct"
the information before it fails. This takes the user out of the normal
program flow and it brings up an "outside" screen that is not
consistant with the rest of the dialogs.


I would like to disable this dialog or simply have the connection fail
if incorrect user information is given. Does anyone out there know if
this can be done? Thanks.