# File lib/rubygame/event.rb, line 227
                def initialize(key,mods)
                        if key.kind_of? Integer
                                @key = key
                                @string = Rubygame.key2str(key, mods) #a string or nil
                        elsif key.kind_of? String
                                @key = Rubygame::Key::ASCII2KEY[key]
                                if @key != nil
                                        @string = key
                                else
                                        raise(ArgumentError,"First argument of KeyUpEvent.new() must be an Integer KeySym (like K_A) or a ASCII-like String (like \"a\" or \"A\"). Got %s (%s)"%[key,key.class])
                                end
                        end
                        @mods = mods
                end