Hi Jerry,

>now how can I clear the Listbox?

Clear(), as Naomi said. Since I just worked on the RowSource property yesterday: In VFP you can fill a listbox by changing the RowSource, but you can't clear it by clearing the RowSource:

This.RowSource = "a,b,c" && combobox show a,b,c
This.RowSource = "x,y" && combobox shows x and y
This.RowSource = "" && combobox still shows x and y

not that this was your question, but anyway... ;-)