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The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.
The latest version of this topic can be found at C Run-Time Library Reference.
The Microsoft run-time library provides routines for programming for the Microsoft Windows operating system. These routines automate many common programming tasks that are not provided by the C and C++ languages.
Sample programs are included in the individual reference topics for most routines in the library.
In This Section
C Run-Time Libraries
Discusses the .lib files that comprise the C run-time libraries.
Run-Time Routines by Category
Provides links to the run-time library by category.
Global Variables and Standard Types
Provides links to the global variables and standard types provided by the run-time library.
Global Constants
Provides links to the global constants defined by the run-time library.
Alphabetical Function Reference
Provides a table of contents entry point into an alphabetical listing of all C run-time library functions.
Generic-Text Mappings
Provides links to the generic-text mappings defined in Tchar.h.
Language and Country/Region Strings
Describes how to use the setlocale function to set the language and Country/Region strings.
Related Sections
Debug Routines
Provides links to the debug versions of the run-time library routines.
Run-Time Error Checking
Provides links to functions that support run-time error checks.
Run-Time Library Behavior
Discusses the entry point into the CRT DLL.
Visual C++ Libraries
Provides links to the various libraries provided with Visual C++, including ATL, MFC, OLE DB Templates, the C run-time library, and the Standard C++ Library.
Debugging
Provides links to using the Visual Studio debugger to correct logic errors in your application or stored procedures.