get tree of file and subfolder display in txt file

Hello everybody,

I try to get all folder, subfolder name and file mane, type in output file.

the output must display like a tree.

EX content of C:

C\

     B\B1\T.txt

      D\H.pdf

Output: file.txt

C

     B

          B1

                T.txt(txt)        

     D   

          H.pdf(pdf)

I thank you for your very valuable help.