I'm using the following code to show the 'CloseButton' on my tabs:
Me.UltraTabbedMdiManager1.TabSettings.CloseButtonAlignment = Infragistics.Win.UltraWinTabs.TabCloseButtonAlignment.AfterContentMe.UltraTabbedMdiManager1.TabSettings.CloseButtonVisibility = Infragistics.Win.UltraWinTabs.TabCloseButtonVisibility.WhenSelectedOrHotTracked
But, is there anyway for me to specify this per-tab? I'd like to have some tabs that can not be closed/not have the close button visible.
Yes. On each tab, there is a Settings.CloseButtonVisibility which you can set to Never. The TabSettings on the tabbed mdi manager just serve as defaults for tabs which don't have the corresponding properties set on their Settings object.