static void udp_callback(VMINT hdl, VMINT evt)
 {
     vm_ip_address_t sendto = {0};
     sendto.address[0] = 192;
     sendto.address[1] = 168;
     sendto.address[2] = 1;
     sendto.address[3] = 33;
     sendto.address_length = 4;
     sendto.port = 2500;

     void* buffer = "Hello";

     switch (evt)
     {
     case VM_UDP_EVENT_WRITE:
         {
             VMINT ret = 0;
             ret = vm_udp_send(hdl, buffer, 6, &sendto);
         }break;
     default:
         {

         }break;
     }
}