Editing WoW:API CheckInbox

{{wowapi}}
Populates client's inbox with messages.
 CheckInbox();

==Details==
* This function requires that the mailbox window is open.
* After it is called and the inbox populated, the client's stored mailbox information can be accessed from anywhere in the world. That is, functions like {{api|GetInboxHeaderInfo}}() and {{api|GetInboxNumItems}}() may be called from anywhere. Note that only the *stored* information can be accessed -- to get current inbox info, you have to call CheckInbox() again.