Valid reference counting programming?

[Halifax]

Here is the background. I want to make a engine-wide change in which every single thing is affected so that it contains a method such playAudio() (that's a joke).

My question being, is this a good reference counting programming practice to change the reference counting class, and add in this method? Or should I find another method, such as implementing my engine-wide methods in another class, and having every class that inherits from IUnknown, also inherit from IStateWideChange?

(Really, I know at the end of the day I could do whatever I want, but I would just like to know which method is preferred.)

[MasterGod]

I don't think you should change IReferenceCounted class because that class has a special purpose and should not exceed it by adding features (methods).

[Halifax]

I guess you are correct, but I just find it a total waste of time to write another class, and then have to go through all the files and modify them to inherit from it. But it's okay I guess, I will just use 'find and replace'.

[rogerborg]

I suggest you turn off your targeting computer and trust your instincts.