[farangkao]

As far as i know it's not there, however...

you can use the trick to check for new Functions or Globals (introduced in a certain version)

for example:

function GetAPIVersion()
  if GetTradingHouseListingItemLink then return 10007 end  
  return 10003
end

I've not tested this example code (just in my mind), basically if a function doesn't exists it returns nil, and therefore the "if" statement fails and goes to the next line.