DesktopWindow.Title
From Xojo Documentation
Property (As String )
aDesktopWindow.Title = newStringValue
or
StringValue = aDesktopWindow.Title
New in 2021r3
Supported for all project types and targets.
or
StringValue = aDesktopWindow.Title
New in 2021r3
Supported for all project types and targets.
The text in the window’s Title bar.