<p>When I dynamically create a Datagrid and add in a new buttoncolumn how do I access the buttoncolumn_click event?  </p>

<p>Thanks.</p>

This article on the MSDN site clearly explains how to go about
adding a button into a datagrid
. Instead of using the click event of the button you'll use the command event of the DataGrid. Each button will be passing specific commandarguments that you will set.
This article shows
how to use the command event with buttons
. In it you use CommandArguments and CommandNames.