Public Property Cancel As System.Boolean

public System.bool Cancel {get; set;}

//Create the DataSourceClick event handler  
this.arDesigner.DataSourceIconClick += new DataSourceIconClickEventHandler(arDesigner_DataSourceIconClick);  
  
//Create the event handling method to respond to the user clicking the Datasource Icon  
//Set Cancel to True to stop the default Datasource dialog from showing  
private void arDesigner_DataSourceIconClick(object sender, DataSourceIconClickArgs e)  
{  
    e.Cancel = true;  
  
    Form f = new Form();  
    f.ShowDialog(this);  
  
    // Add custom code to modify the report data source based on user preference  
}

'Create the DataSourceClick event handler
Me.arDesigner.DataSourceIconClick += New DataSourceIconClickEventHandler(arDesigner_DataSourceIconClick)

'Create the event handling method to respond to the user clicking the Datasource Icon
'Set Cancel to True to stop the default Datasource dialog from showi
Private Sub arDesigner_DataSourceIconClick(ByVal sender As Object, ByVal e As DataSourceIconClickArgs)
    e.Cancel = True

    Dim f As Form = New Form()
    f.ShowDialog(Me)

    ' Add custom code to modify the report data source based on user preference
End Sub