+2  A: 

Pass the column object to the getFieldSortInfo(column) method; it will give you a SortInfo object that has status (actual or proposed) and descending (boolean) variables that contain the information you need.

Amarghosh
Thank you! But, how can I programmatically apply this sorting parameters to the AdvancedDataGridColumn?
Dr. Noise
@Sergey Use the [sortCompareFunction](http://livedocs.adobe.com/flex/3/langref/mx/controls/advancedDataGridClasses/AdvancedDataGridColumn.html#sortCompareFunction)
Amarghosh