Indicates the column used for sorting on an E3Browser. Default value of this property is -1 (minus one), that is, uses the sorting order of the Query that provides data. Configuring this property with a value less than 1 (one) or greater than the number of columns removes E3Browser's sorting order. On the other hand, configuring this property repeatedly with the same value of column changes the sorting order of that column, indicated in the SortOrder property, to no sort order (SONoSort), to an ascending order (SOAsc), and to a descending order (SODesc), and so on, thus simulating a mouse click on the respective column.