hello all

I have a txt file. It may consist of alphabets(both the cases), numbers and special characters.
I want a binary reprsentation of this file i.e. I want the data in binary.
Also I want to get the original text by using this binary file.
How can I achieve this?
I want to do this to implement steganography.
I dont even know where to start on this.Any ideas anyone?
Please do help me.
Any help is apprecialted!
Thank you!