how can i add the items in combox?i want to add item and then if user select that item it will open new form containg item which we selected.i want to make combox in which i want to select all browser which i have installed in my system and then if i select the combobox it ll show the browser name.

Looking in the help file will show how to add and retrieve combobox items.

to add
combobox.items.add("xyz")
combobox.items.add("abc")

to retrieve u can use
combobox.selecteditem or combobox.selectedindex