How to make Script Function Arguments call by Reference?

Hi Everyone,

I brought the Game Engine for about a year. But still can't catch up with the scripting language it uses.

Here is some of my biggest problems:


1. It is any way to make a script function accept call-by-reference-parameters?


2. I found some variables which does not start with
'$' or '%' sign. what does it mean? are those variables global or local?


3. the constructor syntax is differenc form the c++ one.
e.g.
%conn = new GameConnection(ServerConnection);

in the above case, '%conn' is the local variable point the a created instance of a class named 'GameConnection'. Then what does 'ServerConnection' mean?


4. continue from the 3rd question. how about the meaning of a function like:
ServerConnection.prepDemoRecord();


I seacrhed for the answer for a long time but no found.
Would anyone Kindly tell me the answer or suggest some good resources?

Thanks a lot!!