Why would a user of your application know the name of a method in the original source code? That is diabolical. Furthermore, you still haven't provided what I would consider a "full and clear description". As Sitten Spynne said, you are still explaining how you're trying to do it and not what you're trying to do.

If you are determined to go down this path then I will say that you should investigate Reflection. I'm not willing to go into more detail if you aren't though, because I still have serious doubts that it's not a waste of time because it's not the most appropriate option. If you are unable or unwilling to provide a proper description of the purpose of your application (NOT its implementation) then I'm afraid that I, for one, am unable or unwilling to help further.