G'Day Keith,
 
-=> Quoting Keith Fowler to All <=-
 KF> Hello.. I have just bought Turbo C/C++ Version 3.0 for DOS, and i
 KF> was  wondering how i use a library?? (not one of the ones include)..
 KF> The Library  is some comm routines.. Now, i know you can link it with
 KF> your program using  ther command line (TLINK? ).. But if so, when ya
 KF> write ya code in the IDE,  when ya run it, ya wouldn't be able to
 KF> test... So, if ya can use a library  beside the command line, could you
 KF> please post a detailed set of instruction  (as long as they get the job
 KF> done really :-), so that i can use this library.. Thanks, Bye

Easy enough, you have to put the library into a project.
I assume things haven't changed much in the IDE since V2.
You may have a .lib or a .c or .cpp library, but they all work the same 
way.

1. Start a new project and add your source code to it. If you don't have 
the source yet, you can just type in a filename and open it later.
You will need that source there, as libraries will not compile alone,
because they don't (actually better not) have a main() function in them.

2. Add the library module to the project also.

3. The lib file came with at least one header, so declare the header in 
  your source #include "hislib.h", but do not add it to the project 
  window.
Btw, headers that are not in the normal include paths are included with
double quotes #include "path\myheader.h" instead of #include
.
Finally add a main() function to your code.

                       
Should compile now, and the functions will be available from the library..

Mind you, i don't like libraries which come as .lib files only.They can
not be changed,or viewed, you can not trace into them and you're stuck 
with the authors naming convention, which sometimes can drive you nuts. 
                                                     
  L8r Frank (fadam{at}ozemail.com.au).
  
___ Blue Wave/DOS v2.21

--- Maximus 3.01