Clear Data from Datagrid Control?

I am use to using the MSHFlexGrid and now since the datagrid is a .NET control and the FlexGrid is a COM control I am using the datagrid now. This is a really basic question. I have a datagrid I add data to from an Excel Doc using OleDb. Once it is filled with the file my program allows you to export the data. What I need is this how do I clear the datagrid when I import data from another Excel doc? There is no DataGrid1.Clear method.