update list box with multithreded environment

Question

Hi,how can I grab information from url or darabase using threads and set the returned information in one listbox using c#??
I tried to do that but the error is :
the listbox cann't give the control for adding items to more than one thread.
I want the result set from all threads to be in the listbox....



thanx alot
Eng.Bilal Salas