Using the ExpressMasterView is one of the simplest things you can do as a programmer and when finished, offers you an incredibly elegant way to present data to your end-users.
To start using ExpressMasterView, drop your Dataset and Datasource controls on a form and set them to the appropriate values. Add the ExpressMasterView component to the form and double click it to activate the component editor.
Select the <Root> node in the Levels section of the editor and click add. This will add a top level from which you will build the rest of your master/detail relationships. You can have any number of top levels that you wish, each displaying its own unique relationship hierarchy or different views of the same hierarchy.
Set the Datasource property of the top level to that of your master dataset.