The Microsoft run-time library contains routines and features that support American National Standards Institute (ANSI) C and UNIX C compatibility, DOS and Microsoft WindowsÔ programming, and sophisticated graphics programming.
To ease the task of transporting programs between operating systems and compilers, the description of each run-time library routine includes a compatibility section. A routine with full compatibility has the following entries:
Standards:ANSI, UNIX
16-Bit:DOS, QWIN, WIN, WIN DLL
32-Bit:DOS32X
(In this book, references to UNIX systems also encompass XENIXÒ and other UNIX-like systems.)