I want to create a help documentation. Please recommend which route/method to go with.

Hi

I'm creating bunch macros that myself and my colleagues can use at work. I was thinking that once I have finished the macros it would be nice gesture to include some documentation/tutorial together with the tools. This way the supporting documentation would allow the users to learn how to operate the tool(s) or get some help if they struggle to remember something, etc. At my work I have some older colleagues who aren't very computer literate (hence why I'm trying create some macros to help them in first place).
So far I have always gone the extra mile by trying to create simple, logical and nice looking user interfaces (macro buttons, drop down menus, etc) to make things easy as possible for the less experienced users. I really take pride in everything that I do (on VBA side excelforums.com has been massive help for me ) and I like if everything looks nice/cool but professional.

In certain areas I do have some notes/comments already within the spreadsheet itself but I feel that there is quite a lot of information that I would like to pass via tutorial/help documentation. In your opinion what is the best route to go down with:

1. Should I just create .PDF or .doc tutorials, or would it be worth while to look into creating a .CHM help file (though my already basic HTML language is quite rusty)?
2. What would be the benefit to choose your recommended option?
3. Or are there some other options that I didn't think of?

My only requirement would be that the supporting documentation should be accessible via macro button to keep things easy for the user (e.g. the help file will be in a same folder as the .xls file, and VBA could open it).


Any ideas or recommendations are much welcome.
Cheers