Editing WildStar:UI Event

{{\|uievent}}
:''Were you looking for the list of [[\API events]]?''

This is the main WS event reference. Events are a basic message passing system which are received by ''event handlers'' as Lua table and function. Many require registration in Lua.

== Startup ==
During start-up the 'OnLoad' event fires for an AddOn during load, allowing it register for further event and timer messages.

== Registration ==
You can register any other table and function to receive an event using the {{\|api||Apollo|RegisterEventHandler}}(sEventName, sFuncName, tHandler) function. When the events occur they will be delivered to that script handler.

== Removal == 
To unregister an event handler, use {{\|api||Apollo|RemoveEventHandler}}(sEventName, tHandler).

== Performance ==
The WildStar interface is nearly entirely event driven, and all interface code is invoked in response to an event. Script execution must be completed before a frame is rendered; therefore, event processing code that takes too long or contains an infinite loop can drastically degrade the client visibly. 

== See also ==
* [[\Handling events]] - setting up event handling for an AddOn
* [[\Registering events]] - how to create new events for use by AddOns
* [[\Parsing event messages]] - extracting information from event's parameters
* [[\UI AddOn]]