using this pointer...

    
class BaseMessageIndex
{
public:

protected:
	void RegisterID(MESSAGEID messageid)
	{
//		IDRegistry.insert((unsigned char)messageid,this);
	}

	void RegisterString(string &messagestring)
	{
		StringRegistry.insert(messagestring,this);
	}

	typedef map<unsigned char,	BaseMessageIndex*> IDRegistryMap;
	typedef map<string,			BaseMessageIndex*> StringRegistryMap;
	static IDRegistryMap		IDRegistry;
	static StringRegistryMap	StringRegistry;
};