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.

  • ANSI

  • ISO C 95

  • Windows 2000

  • Windows XP

  • Windows Server 2003

  • Windows Vista

All run-time library routines included with this product are compatible with the Windows API.

In This Section

ANSI C Compliance


Windows Platforms (CRT)

Backward Compatibility

See Also


C Run-Time Libraries