I don't think you can get what you want using XL. XL was never designed
or implemented as a secure platform.

Even if you were to protect your sheet after applying the hidden
property to your cells, that protection can be overridden by anyone with
enough gumption to find these groups:

http://www.mcgimpsey.com/excel/removepwords.html




In article ,
"ROHIT" wrote:

But I want to use formula in other cell (through fill handel), If we protect
sheet after protect cell with hiden option,No body can editing.

I want anybody use formula but they cannot know which formula is applied.