Platform Independent Coding - DLLs and SOs

#if defined(_MSC_VER)
    #include <windows.h>	
#endif // Microsoft compiler 

#if defined(__GNUC__)
	#include "C:/cygwin/usr/include/dlfcn.h"
#endif // GNU compiler

/*

  #if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000


// Insert your headers here
/ Boby Thomas(RBIN/ECB-T1)
// 24-02-1981
// add.h 
//
#define WIN32_LEAN_AND_MEAN		// Exclude rarely-used stuff from Windows headers
*/

// The following ifdef block is the standard way of creating macros which make exporting 
// from a DLL simpler. All files within this DLL are compiled with the ADD_EXPORTS
// symbol defined on the command line. this symbol should not be defined on any project
// that uses this DLL. This way any other project whose source files include this file see 
// ADD_API functions as being imported from a DLL, wheras this DLL sees symbols
// defined with this macro as being exported.
//#ifdef ADD_EXPORTS
#define ADD_API __declspec(dllexport)
//#else
//#define ADD_API __declspec(dllimport)
//#endif

// This class is exported from the add.dll
class CAdd {
public:
	CAdd(void);
	// TODO: add your methods here.
};


extern "C" 
#if defined(_MSC_VER)
ADD_API 
#endif
int fnAdd(int, int);