When a tree item is clicked, the Tree View will invoke a webroutine. If the listtype is 'unlevelled' then the webroutine specified in list_onselect_wamname_field/list_onselect_wrname_field will be invoked. If the listtype is 'levelled' or an item specific webroutine has not been specified, the webroutine specified in onselect_wamname/onselect_wrname will be invoked.
Two fields and a list are sent to the webroutine.
While the properties above allow you to specify what fields the information is put into, you still need to define those fields in the WEB_MAP for the onsubmit webroutine.