Checking values not stored as text on rowdatabound for the grid view

I have a grid view that 9 visible columns with 5 of them be just plain
bound columns. One column is a linkbutton which i've already gotten to
work. The final three columns I want to be image buttons which I have
been able to show in the grid.

What I would like to do is check the value related to that particular
column (a boolean value) in the rowdatabound event of the grid view.
If the value is true, then show the image button; if the value is false
then hide the image button. Basically, the image buttons will be
poping up model windows with data related to the accounts in the
different rows in the grid. It will be a simple way of checking
certain details without going to the detail screen.

Any ideas?

Warren