Datagrid headers fire Click event

[SteveInBeloit]

VS 2003

I have a datagrid, and on the click event I process the selected row. You click the selector on the left side of the row.
If you click any of the column headings, the click event fires for the row that currently has the focus. So if you are just trying to drag and re-size columns, it fires and process that row.

I just want my code to execute if you click on the record selector to the left. How can this be done?
Thanks