ListBox.CellToolTipAt
From Xojo Documentation
Method
ListBox.CellTooTipAt(RowNumber as Integer, ColumnNumber as Integer) As String
New in 2019r2
Supported for all project types and targets.
New in 2019r2
Supported for all project types and targets.
Used to set or get the help tag (i.e. tooltip) for a ListBox cell. row and column are zero-based.
Example
The following adds a tip to cell 0,0. The tip is visible when the user moves the pointer over the cell.
Listbox1.CellToolTipAt(0, 0) = "Enter your full name."