I like to show a POPUP shortcut if a node is right clicked in a treeview

Because tree view doesn't have a right click event (i wonder why?) i tried to simulate
it by putting in the init event

on key label rightclick lRightclick=.t.
where lRightclick is public

however "on key label" works only if you click outside the tree view box not when you click a node.

TIA for suggestions.