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unlock foxpro record using OLEDB

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Last Modified: 2013-11-24
using OLEDB to connect to a VisualFoxpro driver.  I'd like to unlock a record. How to do this.
I've written a test script that locks, then unlocks a record.  Locking the record works, but unlocking doesn't:
object lockedstatus = null;
                  string testSQL = "select RECNO() from loadout where batch = '0000002'";
                  string sConnectionString = HostDatabase.HostDatabaseConnectionString();
                  OleDbConnection connection = new OleDbConnection(sConnectionString);
                  connection.Open();
                  OleDbCommand myCommand = new OleDbCommand(testSQL, connection);
                  object recno = myCommand.ExecuteScalar();
                  if (recno != null)
                  {
                        myCommand.CommandText = "select rlock('"+recno.ToString()+"','loadout') from loadout where recno() ="+recno.ToString();
                        lockedstatus = myCommand.ExecuteScalar();
                                myCommand.CommandText = "unlock in loadout";
                        //myCommand.CommandText = "Execscript('unlock in loadout')";
                        //lockedstatus = myCommand.ExecuteNonQuery();
                        lockedstatus = myCommand.ExecuteScalar();
                  }
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