<snip>
>Now: how can I add the "Edit property/method" back in that shortcut menu? In other words, what are the parameters for Sys(1500) in order to use the same menu entry as the Class/Edit Property Method from main menu, visible when Class/Form designers are shown?
>

You'll have to write your own "Edit property/method" form because VFP doesn't provide any way to call existing shortcut menu items.