Infragistics ultraWinGrid

Hi,

I am using Infragistics ultraWinGrid in C# windows application.Whenever the cancel button is clicked, I want to cancel the changes in the currently edited row in Grid. For that I have to know the rowIndex of the currently edited row.
I want to use this line in my code  ds.Tables["user"].Rows[rowIndex].RejectChanges();

For this line to work I need to know the currently edited gridrow rowindex. Suppose there are 12 rows in the grid and I edited the 8 th row(row index is 7), how to get the rowIndex  in code to reject it's changes in cancel buutton click event.

Hope my explanation is clear to you. If you have any questions pls let me know.
I appreciate your help.

Thank You,
Kavya V