You can try code like:
private void gridGroupingControl1_TableControlCheckBoxClick(object sender, GridTableControlCellClickEventArgs e)
{
GridTableCellStyleInfo style = e.TableControl.GetTableViewStyleInfo(e.Inner.RowIndex, e.Inner.ColIndex);
if(style.Enabled)
{
Console.WriteLine("gridGroupingControl1_TableControlCheckBoxClick");
}
}