I have an application that generates a file. I can give any kind of extension
name to this file generated. I have full control on output generated in this
file. Meaning, I can put quotes, single qute, tab, etc anywhere I want.

My objective is to open up this file in Excel. When I do that, some text
like "00010010" ends up becoming 10010. How do I avoid that from happening.
Note that since the file extension is already a ".xls" or a ".csv", Excel
opens it up right away, rather than going through a formatting steps that I
would normally go through for opening up a ".txt" file.

What I have tried so far is
1) "00010010"
2) '00010010'
3) '00010010
None of these produces the desired result. I would appreciate any help
provided. thanks in advance.