This identifier is declared in the public header but is not handled by

the shared menu constructor, setter, or getter.

BOOL; declared initialize, set, get.

The implementation handles MUIA_Menu_Enabled and MUIA_Menuitem_Enabled

instead, as aliases for one object-local flag. Setting that flag on a

Menustrip does not disable all descendants: NewMenu generation emits

children and does not propagate the root's enabled state.

Do not treat this attribute as a working whole-menustrip enable switch.

An OM_SET tag can reach Notify and trigger a registration without any

corresponding menu state being stored. There is no successful menu

getter for this identifier.

Family.mui

Represent a container of menu titles and their entries. The conventional

tree is Menustrip, then Menu children, then Menuitem children and

optional Menuitem subitems.

All three menu classes use the same attribute and method handlers and

derive directly from Family.mui. They differ by an internal type flag.

Family owns attached children and disposes of them; title and shortcut

strings remain borrowed. Enabled defaults to TRUE; Checked, Checkit,

CommandString, Toggle, and Exclude default to zero; title, shortcut,

trigger, and generated-menu pointers default to NULL.

A recognized menu-attribute set requests MUIM_Application_UpdateMenus

when the object has global info with an application pointer. That

request is synchronous and its result is ignored. Changes made before

connection are stored without requesting an application update. String

storage must remain valid while the object or any generated menu still

refers to it.

ConnectParent first obtains the parent's global info through Notify,

stores the parent pointer, and recursively connects every child to this

object. It returns TRUE. DisconnectParent recursively forwards the

message to children, clears this object's parent pointer, then calls the

superclass and returns TRUE. Global info remains borrowed and is not

cleared by Notify.

AddHead, AddTail, Insert, Remove, OM_ADDMEMBER, and OM_REMMEMBER forward

to Family and then request an application menu update when connected,

even if the operation returned failure. Their original return value is

preserved. Sort is inherited without an update request; Transfer invokes

the normal Remove and AddTail methods for its children. Serialize all

tree operations and do not mutate the traversal from callbacks.

Other methods and attributes follow Family and Notify. These classes add

no new public method identifiers.

The three constructors do not check whether common superclass

construction returned NULL before writing their type flag. Allocation

failure or a NULL child that makes Family construction fail can

therefore cause invalid memory access instead of a clean NULL return. Do

not rely on the normal constructor-failure contract for these

implementations.