Hi Steve,
The TabPages gets arranged in the order as they are added. To change the sequence of pages, you have to clear the tabPages and re-add them in the order you desired as shown in the following code snippet
this.tabControlAdv1.TabPages.Clear();
this.tabControlAdv1.Controls.AddRange(new System.Windows.Forms.Control[] { this.tabPageAdv1, this.tabPageAdv3, this.tabPageAdv5, this.tabPageAdv4, this.tabPageAdv2});
Please refer to the sample attached that illustrates this issue and let me know if you have any questions.
Thanks for using Syncfusion products.
Regards,
Mano
F36196.zip