How do I see what functions are available in a particular library?
The one I'm interested in is the DigiPotX9Cxxx.h library.
Read the documentation or read the .h file.
There is no documentation, that I can find. Where do u find it?
What program opens the .h file?
sluka:
There is no documentation, that I can find. Where do u find it?
What program opens the .h file?
A text editor. Where did you find the library?
cheers
Online here. I wouldn't have expected to find it in a neighborhood bar. 
You're welcome.
Yip, a lot clearer now.I'm learning all the time. Thanks for the quick reply.
Some github repositories use the wiki that you can click on for documentation. Mine has a wiki, not perfect but at least it has one. A lot of geeky programmers don't think they need to document anything. "My code speaks for itself".
aarg:
. . . . A lot of geeky programmers don't think they need to document anything. "My code speaks for itself".
Indeed. With all this 'community' developed software (& hardware) you some times get the feeling you are getting what you have paid for. There are few controls and few standards and the documentation, even the official arduino.cc/reference is often very poor. With some contributed libraries, you may even find yourself studying the library source code to find out what methods to call with what parameters.
Having said all that, it is much more fun that working in a commercial environment with strict release procedures and certainly no source code.
Yes all agreed. I have got something to go and try practically now. Many thanks to all.......