void hl_tcp_conn_cb(VM_TCP_HANDLE handle, VM_TCP_EVENT event)
 {
     VMINT nwrite;
     switch (event)
     {
         case VM_TCP_EVENT_CONNECTED:
             nwrite = vm_tcp_write(
                         handle,
                         "GET www.mediatek.com HTTP/1.1rnHost: www.mediatek.comrnrn",
                         strlen("GET www.mediatek.com HTTP/1.1rnHost: www.mediatek.comrnrn"));
             break;
         default:
             return;
     }
     return;
 }