AAuto中如何得到listbox里所有列的值 ？

import win.ui;
/*DSG{{*/
var winform = win.form(parent=...; text="AAuto Form";right=349;bottom=249 )
winform.add(
button={ bottom=237;text="button";left=131;top=204;z=1;right=291;cls="button" };
listbox={ bgcolor=16777215;bottom=163;text="listbox";left=34;
items={ "1";"2";"3" };top=50;z=3;right=151;edge=1;cls="listbox" };
edit={ bottom=164;text="edit";left=187;multiline=1;top=20;z=2;right=328;edge=1;cls="edit" }
)
/*}}*/
winform.button.oncommand = function(id,event){
        winform.edit.text = table.tostring( winform.listbox.items )
}
winform.show()
win.loopMessage();