Hi Jeff,
We do provide support for SelectedTab property in TabControlAdv. The following code snippet illustrates this.
//Set SelectedTab property of the TabControlAdv
Me.tabControlAdv1.SelectedTab = Me.tabPageAdv2
Please have a look at the attached sample and let me know if this helps you.
Thanks for your interest in Syncfusion products.
TabControlAdvBest Regards,
Golda