CustomCallback!

The CustomCallback for a DevExpress ASPxGridView may be prepped like so:

MyGrid.CustomCallback += MyGrid_CustomCallback;

 
 

...and like so:

private void MyGrid_CustomCallback(object sender,
      ASPxGridViewCustomCallbackEventArgs e)
{

 
 

In order to actually step into the method you're going to need to rickroll a client side event to this server side event like this:

<ClientSideEvents CheckedChanged="function(s,e) {MyGrid.PerformCallback(s.Value);}">
</ClientSideEvents>