onselect_wamname
The name of the WAM whose Webroutine will be invoked when an item in the tree is selected. Individual items in an unlevelled list can override this using the list_onselect_wamname_field property.
Default value
The current WAM.
Valid values
The name of a WAM, in single quotes. A selection can be made from a list of known WAMs by clicking on the corresponding dropdown button in the property sheet.