{

    DictTable  dictTable;

    Connection connection;

    Statement  statement;

    str        sql;

    ResultSet  resultSet;

    SqlStatementExecutePermission perm;

    ;

    dictTable = new DictTable(tableNum(CustTable));

    if (dictTable != null)

        {

           connection = new Connection();

           sql = strfmt( "SELECT * FROM %1", dictTable.name(DbBackend::Sql) );

           perm = new SqlStatementExecutePermission(sql);

           // Check for permission to use the statement.

           perm.assert();

           statement = connection.createStatement();

           resultSet = statement.executeQuery(sql);

           // End the scope of the assert call.

           CodeAccessPermission::revertAssert();

        }

}

Error:
Request for the permission of type 'SqlStatementExecutePermission' failed.

(S)\Classes\SqlStatementExecutePermission\demand
(S)\Classes\Statement\executeQuery
(C)\Jobs\main - line 20

这段例子是在msdn中给出的，可是运行的时候却给出上面的错误。明白的朋友给点建议！