DesktopTabPanel.AddPanel
From Xojo Documentation
Method
Adds a panel after the last panel of the TabPanel and uses the passed string as its caption.
Example
Add a tab called "Extra" to the TabPanel:
TabPanel1.AddPanel("Extra")
Adds a panel after the last panel of the TabPanel and uses the passed string as its caption.
Add a tab called "Extra" to the TabPanel: