【winapi】加载动态库 (loadlibrary)

概述：通过 using 给导出函数起别名

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加载

using的用法参考 使用using起别名

#include <iostream>
#include <windows.h>
#include "PipeIPC/PipeIPC.h"
 
int main()
{
    std::cout << "--- DLL Test ---\n";
 
    HINSTANCE hDLL; // Handle to DLL
    using Face = int * (*)(int,int);
 
    hDLL = LoadLibrary(L"mydll.dll");
     if (hDLL != NULL)
    {
        Face faceSum = (Face)GetProcAddress(hDLL,
            "mySum");
 
        if (!faceSum)
        {
            // handle the error
            FreeLibrary(hDLL);
            return 0;
        }
        else
        {
            // call the function
           	faceSum(1,1);
        }
    }
    return 0;
}

生成动态库

dllmain.cpp

#ifdef __cplusplus
extern "C"
{
#endif	 
 
#define MYIMAPI extern "C" __declspec(dllimport)
 
#define MYEXAPI extern "C" __declspec(dllexport)
 
#ifdef __cplusplus
}
#endif
 
MYEXAPI int Add(int numa, int numb)
{
    return numa + numb;
}
 
MYEXAPI int Sub(int numa, int numb)
{
	return (numa - numb);
}