polarity.h

来自「本源码是vc环境下的usb程序」· C头文件 代码 · 共 42 行

/*++

Copyright (C) 1999 Microsoft Corporation

Module Name:

    POLARITY.H

Abstract:

    properly map __declspec( dllexport ) or import

History:

--*/

#if _MSC_VER > 1000
#pragma once
#endif

// If we are building the DLL then define the 
// class as exported otherwise as imported
// ============================================
#ifndef POLARITY_HEADERFILE_IS_INCLUDED
#define POLARITY_HEADERFILE_IS_INCLUDED
//#pragma message( "Including Polarity.h..." )

 #ifdef USE_POLARITY
  #ifdef BUILDING_DLL
//   #pragma message( "Building static library or DLL..." )
   #define POLARITY __declspec( dllexport )
  #else 
//   #pragma message( "Building Provider..." )
   #define POLARITY __declspec( dllimport )
  #endif
 #else
  #define POLARITY
//  #pragma message( "NO Polarity...")
 #endif
#endif