Editing WoW:API SetScreenResolution

{{wowapi}}__NOTOC__
Returns the index of the current resolution in effect
  SetScreenResolution([index])

===Takes===
: Number index (optional)
:: This value specifies the new screen resolution, it must be the index of one of the values yielded by [[API_GetScreenResolutions|GetScreenResolutions()]].
:: Passing nil will default this argument to 1, the lowest resolution available

===Returns===
: Nothing

===Example===
<dd>
This sets the screen to 1024x768, if available:
 local resolutions = {GetScreenResolutions()}
 for i,entry in resolutions do
   if entry == '1024x768' then
     SetScreenResolution(i)
     break
   end
 end