string url = "tcp://localhost:port";
if(DialogResult.OK == GroupLab.Networking.UrlPrompt.Show(ref url))
{
// add your code here
// it might look something like this

this.SD.Url = url;
this.SD.Opened += new EventHandler(SD_Opened);
this.SD.Closed += new EventHandler(SD_Closed);
this.SD.Open();
}