Hello,

You could use the 'TabFromForm()' method on the 'UltraTabbedMdiManager' component instance for that:

      ultraTabbedMdiManager1.TabFromForm(ActiveMdiChild);

Here is the documentation over this:

http://help.infragistics.com/Help/NetAdvantage/WinForms/2012.2/CLR4.0/html/Infragistics4.Win.UltraWinTabbedMdi.v12.2~Infragistics.Win.UltraWinTabbedMdi.UltraTabbedMdiManager~TabFromForm.html.

'ActiveMdiChild' is the currently active form on the parent, so you could also pass another form instance to the mentioned method.

Please feel free to let me know if a question about our tool set comes up on your mind.