[2005] DatagridView Question

I am getting familiar with DataGridView and want to ask some questions.On my form was a datagridview which was bounded to my database.The data are displaying properly without any issue.Now, I also included an unbounded DataGridViewCheckBoxColumn which primary purpose is to just check if a certain column in the same datagridview has a value.That is, say if column(4)<>0 then checkbox is checked.

How can I possibly do this...Thanks.

How to: Add an Unbound Column to a Data-Bound Windows Forms DataGridView Control

Thanks Jm to your link, but what I am trying to figure is, say on dataGridviewCellClick event,I would try to find out if a certain column on that particular row has a value, then the checkbox would be checked.