Popupmenu describes a popupmenu (TPopupMenu) that is used by some element of the window.
menu menuitem.html menuseparator
The onshow (OnPopup in Delphi) attribute of popupmenu determines whether there is an onshow event for this window. An onshow event occurs when the popupmenu appears on the screen. When the onshow attribute has the value true, an entry, for handling the onshow event, will be created in the code-frame of the window the popupmenu is in. Allowed values are true and false. The default value is false.
Ignored in PLUG for Delphi
This options specifies the text for the title of the popupmenu.