Try InternetDial() call with INTERNET_AUTODIAL_FORCE_UNATTENDED flag.

>As i told you in the past, I have to make, if no DSL line available, a dialup connection to establish a internet connection.
>Actually i got throught the problem of checking external line number by creating a certain number of remote access links and
>testing with a loop which is the one that works.
>Now I went into the problem of windows messageboxes. How can i get trough that ?
>I receive a message error if the line is busy and sometimes a messagebox asking me if I want to call the number again.
>As there are no operators working on the PC I have to skip those messages.
>Thank you so much
>Alessio