Why do you need the actual row and column index in the RecordDeleted event? It can be found if you really need it, but if you want just want teh value of this column from that record, then there are simpler ways to get it. These row and column index values can change as you sort things or move columns or group or ?? So, it is probably not a good thing to try to save these values for use later.
Do you know the name of the column holding the combobox? If so, and all you want is the value, then you can use code like this to get it in the key down event.
private void gridGroupingControl1_TableControlCurrentCellKeyDown(object sender, GridTableControlKeyEventArgs e)
{
if(e.Inner.KeyCode == Keys.Delete)
{
if(this.gridGroupingControl1.Table.CurrentRecord != null)
{
Console.WriteLine(this.gridGroupingControl1.Table.CurrentRecord.GetValue("Col2"));
//this.gridGroupingControl1.Table.CurrentRecord.Delete();
}
}
}