How to inactivate an Excel built-in function

[JDGiants]

Hi - I have created a custom function for end users, and I need it to replace a built-in Excel function. Can I deactivate, eliminate, bypass, or otherwise render the function useless? How do I do it? And, how do I return it if desired? Thank in advance...

-JD

<<after reading, I realize the title should be "How to deactivate an Excel built-in function>> -JD

[Xenver]

I probably won't be able to tell you haw to do this, but if you want help you're probably going to need to give us more information, what function are you trying to deactivate? what function are you trying to implement? What version of excel are you using?

[Rabbit]

I don't believe you can override the built in functions.

[twinnyfo]

JD,

Why not just inform your users to use the custom designed function instead of the built-in function? I understand that there are a few Excel Functions that do not function according to how the mathemeticians say they should, so using a different function is understandable. I just don't think what youa re requesting is possible--at least not from within this forum.