A simple C++ call dynamic library instance of the code

extern __declspec(dllexport) int FuncTest();  


                                
                        
                                
dlltest.cpp
                                
                        
                                

__declspec(dllexport) int FuncTest(int a )  
{  
    if (a = 1)  
    {  
        return 100;  
    }  
}  

                                
                        
                                
dlltest.def
                                
                        
                                


LIBRARY "testmydll"EXPORTS FuncTest generates dlltest.dlldlltest.lib and creates a WinDLL to copy dlltest. DLL to WinThe Debug directory of 32 is Win32 The dll. CPP file in the project is as follows#include <iostream>     
#include "string"     
#include <stdio.h>    
#include <windows.h>  
using namespace std;  
  
int main()  
{  
    HINSTANCE hDLL = LoadLibrary("testmydll.dll");  
    if (hDLL)  
    {  
        HFUNC hFun = (HFUNC)GetProcAddress(hDLL,"FuncTest");  
        if (hFun)  
        {  
            int a =1;  
            int b = hFun(a);  
            printf("%dn",b); Dlltest. lib = dlltest.lib = dlltest.lib = dlltest.lib = dlltest.lib = dlltest.lib = dlltest.lib = dlltest.lib = dlltest.lib = dlltest.lib = dlltest.lib = dlltest.lib = dlltest.libinThe code in dlL. CPP in the 32 project is as follows#include <iostream>     
#include "string"     
#include <stdio.h>    
#include <windows.h>  
#include "dlltest.h"  
using namespace std;  
#pragma comment(lib,"testmydll.lib")  
__declspec(dllimport) int FuncTest(int a );  
int main()  
{  
    int b = FuncTest(1);  
    printf("%dn",b);  
    return0; } Compile execution prints out 100Copy the code