RW>    I've just started learning C, and I wanted to know if 
RW> programming in OS/2 is much different than DOS.

yes; no. in DOS, you must do everything; in OS/2, many things
are done for you. at the basic level (put "Hello World" up on a
text screen), things aren't much different. once you get fancier,
like accessing the disk or I/O ports, you find that the hacks
possible in DOS are not allowed under OS/2. a good text for
DOS C programming should not be encouraging you to do such
things anyway. with PM programming, you get into a situation
where the OS does LOTS of things for you, and you must provide
a great deal of setup code to get going at making nice windows
on the screen. don't worry, much of it becomes "boilerplate". 
this is where an OS/2-specific text becomes useful.

to be brutally honest, there aren't any good books that both teach
you how to C program AND also how to write OS/2 C programs

since you have C Set ++, you might consider learning C++ to
start with. run down to a bookstore and read the first two
Preface pages of "C++ How to Program" for the argument
in favor of this. you might even want to buy this $35 1994
900 page book. the examples have been tested under C Set ++.
the book is not specific to any OS, however.

remember the (often on-line) documents that come with C Set ++
these will not be much help LEARNING C, but provide valuable
instruction on how to run the compiler, so that you can compile
the example programs in your text. C Set ++ itself comes with
a large set of example programs, both text mode and PM.

___
 X KWQ/2 1.2e X If at first you don't succeed, put out another version (KWQ 1.2c)

--- Maximus/2 2.02