Although I realise this kind of question may attract flak ("Why don't you look for it yourself?"), I have, and I haven't found anything which helps me in several days of searching...
Can anyone please point me to a tutorial (or even a clear and reasonably basic example) of a user-written library unit?
I want to implement a linked list in a library unit, so that I can call a pop, push (and initialise) function in my main application (which will use the library unit) without any code for the linked list functionality being apparent in the main application source.
Any pointers (OK, bad joke) at all gratefully received.