DesktopToolbar.AddButtonAt
From Xojo Documentation
Method
DesktopToolbar.AddButtonAt(Index as Integer, button as DesktopToolbarItem)
New in 2021r3
Supported for all project types and targets.
New in 2021r3
Supported for all project types and targets.
Inserts the passed DesktopToolbarItem in the position indicated by Index.