---
title: "Calling C++ Functions in Inline Assembly | Microsoft Docs"
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ms.date: "11/04/2016"
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---
# Calling C++ Functions in Inline Assembly
## Microsoft Specific  
 An `__asm` block can call only global C++ functions that are not overloaded. If you call an overloaded global C++ function or a C++ member function, the compiler issues an error.  
  
 You can also call any functions declared with **extern "C"** linkage. This allows an `__asm` block within a C++ program to call the C library functions, because all the standard header files declare the library functions to have **extern "C"** linkage.  
  
 **END Microsoft Specific**  
  
## See Also  
 [Inline Assembler](../../assembler/inline/inline-assembler.md)