DesktopToolbar.AddButton
From Xojo Documentation
Method
DesktopToolbar.AddButton(button as DesktopToolbarItem)
New in 2021r3
Supported for all project types and targets.
New in 2021r3
Supported for all project types and targets.
Adds the passed DesktopToolbarItem as the last element of the DesktopToolbar.