The WebListBox has a text hoverover for that is set in HelpTag
Is there none for each row or each cell of the WebListBox?
If not how would I implement one?
Just like the desktop listbox, the help tag is global to the control.
In Desktop, one would use RowfromXY and ColumnFromXY to display a small canvas for each column.
In web, there is no such way to know over which cell the cursor is.
You can do this for each cell using WebListBoxTD in Web Custom Controls. It inherits from WebListBox and is therefore nearly identical, but it lets you use HTML in cells, not just text. With control over the HTML you can have a unique help tag on any cell.