ContainerControl.HelpTag

From Xojo Documentation

Property (As String )
aContainerControl.HelpTag = newStringValue
or
StringValue = aContainerControl.HelpTag

Supported for all project types and targets.

Text of help message displayed as a Windows or Linux "tip" or macOS help tag.

The tip/tag is displayed when the user places the mouse on the control and leaves it there.

Example

Me.HelpTag = "This is a helptag."