Why is CellTag a Property of a Listbox and RowTag a Method of a Listbox?
These seem to me to be analogous. They both can be used to get or set a value.
What feature makes one a Property and the other a Method?
If I had to hazard a guess, CellTag is a newer computed property and the RowTag is an older style Getter/Setter method. You can use them both as properties.