String Handling in XPCOM

#include "nsISupports.idl"

[scriptable, uuid(658ABC9E-29CC-43E9-8A97-9D3C0B67AE8B)]
interface ISample : nsISupports
{
	long		Add(in long a, in long b);  
	string		ReverseString(in string s);
	AString		ReverseAString(in AString nStr);
	wstring		ReverseUnichar(in wstring nStr);
	ACString	ReverseACString(in ACString nStr);	
};