ListBox.RowImageAt
From Xojo Documentation
Method
ListBox.RowImageAt(RowNumber as Integer) As Picture
New in 2019r2
Supported for all project types and targets.
New in 2019r2
Supported for all project types and targets.
Adds the image/picture assigned to the passed row index (zero-based).
Notes
The ListBox row does not resize to accommodate the Picture. If your picture does not fit via RowImageAt, use CellTextPaint or CellBackgroundPaint to draw the picture yourself.
Example
The following example draws a picture in the first cell. The picture has been added to the project.
Listbox1.RowImageAt(0) = UserPhotoImage