Some of your users may have more than one ISP they can select, and the default may not always be who they want to call. If this is the case, set the optional parameter to True to allow user intervention. This feature is not available on Macintosh, as there are no standard dialogs provided for this feature. If the user is running Windows 98/ME, or you pass False or omit the parameter, the system will attempt to connect using the first phonebook entry it can find.