// Get express report table view
var gridView = expressBox.getDataView().getGridView();
// Process the PropertyChanged event
gridView.PropertyChanged.add(function (sender, args) {
    if (!args.isCanceled()) {
        // If the event is cancelled, invoke callback function
        args.fireCallback(sender, args);
    };
});
// get a service used to work with express report
var eaxMdService = expressBox._Service;
// Get express report
var eaxAnalyzer = expressBox.getSource();
// Determine metadata
var metadata = False; // Hide express report table titles
// Determine callback functions
var onPropertyChanged = function (sender, args) {
    // Fire the PropertyChanged event   
    gridView.PropertyChanged.fire(gridView, args.Args);
};
var onPostPropertyChanged = function (sender, args) {        
    // Refresh express report
    expressBox.refreshAll();
};
// Determine arguments for callback function
var args = new PP.Mb.Ui.PropertyChangedEventArgs({
    Callback: PP.Delegate(this.onPostPropertyChanged, eaxMdService, args),
    // Specify that express report table title properties are changed
    PropertyName: PP.Exp.Ui.ControlType.Headers,
    // Specify that express report table titles must be hidden
    Metadata: metadata,
    // Data model can be refreshed via the service
    ModelUpdateData: PP.Exp.Ui.ModelUpdate.Service,
    // It is required to refresh express report table and properties panel
    TypeUpdateData: [PP.Exp.Ui.ViewTypeUpdate.Table, PP.Exp.Ui.ViewTypeUpdate.PropertyBar]
});
// Set if table titles are visible
eaxMdService.setTabSheetHeaders(eaxAnalyzer, metadata, 
    PP.Delegate(this.onPropertyChanged, eaxMdService, args));