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The Microsoft run-time library supports American National Standards Institute (ANSI) C and UNIX C. In this documentation, references to UNIX include XENIX, other UNIX-like systems, and the POSIX subsystem in Windows 2000, Windows XP, Windows Server 2003, and Windows Vista. The description of each run-time library routine includes a compatibility section for the following targets.
ISO C 95
Windows Server 2003
All run-time library routines included with this product are compatible with the Windows API.