switch(dwinternetstatus)
{
case internet_status_resolving_name: // 10
trace("looking up the ip address for %s\n", (lpctstr)lpvstatusinformation);
break;
case internet_status_name_resolved: // 11
trace("name resolved %s\n", (lpctstr)lpvstatusinformation);
break;
case internet_status_connecting_to_server: // 20
// lpvstatusinformation是一个sockaddr的指针
trace("connecting to server--%s...\n", (lpctstr)lpvstatusinformation);
break;
case internet_status_connected_to_server: // 21
// lpvstatusinformation是一个sockaddr的指针
trace("connected to server--%s\n", (lpctstr)lpvstatusinformation);
break;
case internet_status_sending_request: // 30
trace("sending request\n");
