---
title: "OpenMP in Visual C++ | Microsoft Docs"
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# OpenMP in Visual C++
The OpenMP C and C++ application program interface lets you write applications that effectively use multiple processors. Visual C++ supports the OpenMP 2.0 standard.  
  
## In This Section  
 [Directives](../../parallel/openmp/reference/openmp-directives.md)  
 Provides links to directives used in the OpenMP API.  
  
 [Clauses](../../parallel/openmp/reference/openmp-clauses.md)  
 Provides links to clauses used in the OpenMP API.  
  
 [Library Reference](../../parallel/openmp/reference/openmp-library-reference.md)  
 Provides links to constructs used in the OpenMP API.  
  
 [C and C++ Application Program Interface](../../parallel/openmp/openmp-c-and-cpp-application-program-interface.md)  
 Discusses the OpenMP C and C++ API, as documented in the version 2.0 specification from the OpenMP Architecture Review Board.  
  
## Related Sections  
 [/openmp (Enable OpenMP 2.0 Support)](../../build/reference/openmp-enable-openmp-2-0-support.md)  
 Causes the compiler to process `#pragma omp`.  
  
 [Predefined Macros](../../preprocessor/predefined-macros.md)  
 Names the predefined ANSI C and Microsoft C++ implementation macros. See the _OPENMP macro.