Callback with event and delegate over .net remoting

    The other day,I develop a solution that contains a module that validate a good deal expense data by several steps.The solution is a distributed system with .net remoting.
    When the operater click a button with text "Validate Now", UI tier will call a series of  methods in  Business Compnent Tier that sit on the other side of the wire of remoting.To make my program looks more smart and agile,I want to Update the progress value of a progressbar that on the validation UI form when each step completed.How can implement this idea? Can callback from remoting tier to UI tier.