How to select all items on a page in a DevExpress gridview

If you want to add a checkbox to a DevExpress Grid view to select all items on a page it can be achecived with the following:
Note: in order for the CheckBox script to be able to access the gridview, the ClientInstanceName property must be set. Also, if you want the server side selection changed event to be fired, you will need to call PerformCallback on the grid to update the server.