C++及VB调用 c++dll示例

最新推荐文章于 2025-07-10 11:43:36 发布

userNameIsUndefine

最新推荐文章于 2025-07-10 11:43:36 发布

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文章标签： c++

本文链接：https://blog.youkuaiyun.com/angelpaiy/article/details/88974324

dll方法定义：

extern"C"__declspec(dllexport)BSTR __stdcall PayOrder(const char* parmStr);

传入：字符串
返回：字符串

pb调用声明示范：function string PayOrder (string jsonStr) library("EJOrderExchange.dll");c++调用示范

#include <iostream>
#include <Windows.h>

int main(){
    typedef const char* (__stdcall *PayOrder)(const char*);
    HINSTANCE hDllInst = LoadLibrary("XXX.dll");//修改dll位置
    PayOrder pPayOrder = (PayOrder)GetProcAddress(hDllInst, "PayOrder");
    std::string json = "{\"orderNo\":\"36524694546\",\"orderPrice\":\"100.00\",\"orderDate\":\"2019-03-21 15:24:32\",\"summary\":\"摘要\",\"orderDescription\":\"订单说明\",\"shopName\":\"门店名称\",\"payType\":\"1\"}";
    const char* b = pPayOrder(json.c_str());
    std::cout << b <<std::endl;
    FreeLibrary(hDllInst);
    return 0;
}