private string SpecialSendSMS()
{
   Parhot.AdvancedWS.ParhotAdvancedWS objWS = new Parhot.SendWS.ParhotAdvancedWS();

   return objWS.SpecialSendSMS ("YOUR-USERNAME", "YOUR-PASSWORD", "Selected GroupIDs ex. 1,2,3", "Your Favorite SendType ex. 1",                                 "ex. 9121", false, "Your-MerchantChannelID", "Your-Text", "ex. 10", false, "Date1,Date2,Date3",                                 null, null);
}