Editing WoW:API UIParentLoadAddOn (section)

== Details ==

*If the addon fails to load, it is added to a list of failed addons. If you try to load the addon again without reloading the UI, you will not be notified of failure unless you use [[API_LoadAddOn|LoadAddOn]] and write your own edge case.
*As of patch 1.8, you can only use this for addons that are marked on demand in their .toc files (## LoadOnDemand: 1).

Functionally similar to this:
 local loaded, reason = LoadAddOn(name);
 if ( not loaded ) then
     message(format(ADDON_LOAD_FAILED, name, getglobal("ADDON_"..reason)));
 end