D365 Custom datasource EventHandler on ListPage

[pepperov]

Try this:

[ExtensionOf(classStr(ProjProjectsListPageInteraction))]
final public class ProjProjectsListPageInteraction_Extension
{
    public void initializeQuery(Query _query)
    {
        next initializeQuery(_query);
        //your new datasource will be in _query
    }
}

I hope this will help you.