Editing WoW:UI Object UIDropDownMenu (section)

=== Initialization functions ===
The initFunction supplied to UIDropDownMenu_Initialize is called when the menu (as well as any nested menu levels) should be constructed, as well as as part of the UIDropDownMenu_Initialize call (this allows you to use the selection API to specify a selection immediately after binding the function to a menu frame should you so desire). The function is given three arguments:
; frame : Frame handle to the menu frame.
; level : Number specifying nesting level.
; menuList : An {{api|EasyMenu}} helper argument that can safely be ignored.
Additionally, some [[#Global variables|global variables]] may be useful to determine which entry's nested menu the initializer function is asked to supply.

It is expected that the initialization function will create any required menu entries using UIDropDownMenu_AddButton when called.