using CMS.Polls;

using CMS.SettingsProvider;

using CMS.DataEngine;

using CMS.GlobalHelper;

...

      string pollName = "testingpoll"; // Poll code name

      // Get poll info for the specified code name

      PollInfo pollObj = PollInfoProvider.GetPollInfo(pollName);

      if (pollObj != null)

       {

          // Get all answers of the poll

          DataSet ds = PollAnswerInfoProvider.GetAnswers(pollObj.PollID);

          if (!DataHelper.DataSourceIsEmpty(ds))

           {

              // Get first pollanswerinfo object

              PollAnswerInfo pollAnswerObj = new PollAnswerInfo(ds.Tables[0].Rows[0]);

              if (pollAnswerObj != null)

               {

                  // Increment votes by 1

                   pollAnswerObj.AnswerCount++;

                  // Save the data

                  PollAnswerInfoProvider.SetPollAnswerInfo(pollAnswerObj);

               }

           }

       }