Using buttons on MXDATAGRID

I'm using the MXDATAGRID with Web Matrix. I've inserted a few buttons as columns. The first one is delete and works just fine because MXDATAGRID happens to have a "key" word called "Delete". When you place this in the command line for that button, it deletes !

That works fine.

I'm also trying to insert a button called "Load". "Load" should take the row and update a form that is outside the datagrid. This form has the same fields as the grid row but in a user-friendly mode.

Does anyone know how I setup and event which gets triggered when I press a button inside the MXDATAGRID?

thanks - djt