How to remove histogram's content?

Hello,
I have one histogram A, and then I want to use it as a template to create another new histogram B. One way, I think, is to clone A to get B and remove content of B. I am wondering how to remove content of one histogram. Or there is any other way to get one empty histogram with same settings as original one?

Cheers,
Zhiyi.

hist.Reset();

Rene