Search Array in a Array ?

Question

Hello,

i have got two listboxs, there are listbox1 and listbox2

forex.

listbox1.items are = (teacher,school,pen,pencil,germany,asia,asia1,asia2,asia3)listbox2.items are =(asia,pen)
i have to search the listbox2 items in listbox1 and if listbox1 contains the words from listbox2. it must be deleted.
result might be load to listbox3
and the items would be (teacher,school,germany) of course...

and i have got one more questions. i got the list from a text box, but the list is over then 18mb and, i have to wait too much, is there any ways to resolve this waiting prblem...

Thanks