全方位解读DLL文件—调用DLL

显式链接调用

调用之前 MSVC 生成的 mydll_vc.dll 中的函数

#include <stdio.h>
#include <windows.h>
int main(){
    HINSTANCE hMyDLL = NULL; // typedef HINSTANCE HMODULE;
    int (*MyAdd)(int,int);
    hMyDLL = LoadLibrary("mydll_vc.dll");
    if(hMyDLL == NULL){
        printf("Can not open this file!\n");
    }
    MyAdd = (int (*)(int,int))GetProcAddress(hMyDLL,"myadd");
    printf("%d\n",MyAdd(99,999));
    return 0;
}

调用之前 MinGW 生成的 mydll_gcc.dll 中的函数

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
typedef int (*AddFunc)(int,int);
typedef int (*SubFunc)(int,int);
typedef int (*MulFunc)(int,int);
typedef int (*DivFunc)(int,int);
int main(){
    int a=66,b=6;
    HMODULE hDLL = LoadLibrary("mydll_gcc.dll");
    if(hDLL != NULL){
        AddFunc add = (AddFunc)GetProcAddress(hDLL, "add");
        SubFunc sub = (SubFunc)GetProcAddress(hDLL, "sub");
        MulFunc mul = (MulFunc)GetProcAddress(hDLL, "mul");
        DivFunc div = (DivFunc)GetProcAddress(hDLL, "div");
        
        if(add != NULL){
            printf("a+b=%d\n",add(a,b));
        }
        if(sub != NULL){
            printf("a-b=%d\n",sub(a,b));
        }
        if(mul != NULL){
            printf("a*b=%d\n",mul(a,b));
        }
        if(div != NULL){
            printf("a/b=%d\n",div(a,b));
        }
    }else{
        printf("Load Failed!\n");
    }
    FreeLibrary(hDLL);
    system("pause");
    return 0;
}

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