We have  a DocumentWorkspace with the type Infragistics.Practices.CompositeUI.WinForms.UltraMdiTabWorkspace

I want tyo have a Close Button in each tab of this workspace. I am using the 8.1 release of Winforms.

But I cannot manage to get the new close button to work, despite the following code:

DocumentWorkspace.TabSettings.CloseButtonVisibility = Infragistics.Win.UltraWinTabs.TabCloseButtonVisibility.Always;

Could you please help.