Tab Workspace Handler C#

Hi,
How do i handle the tabworkspace events in c#?

I have this:
this.CommandBars.TabWorkspace.SelectedChanged += new XtremeCommandBars.ITabWorkspaceEvents_SelectedChangedEventHandler(TabWorkspace_SelectedChanged);

But not sure what to put here:
private void TabWorkspace_SelectedChanged(object sender, ??????? e) {}

Thanks,
Nick

Never mind problem solved.