调用DLL例子中使用LoadLibrary方法//怎么还需要DLL的头文件???

[code=c]

void CTestDllDlg::OnBnClickedButton1()

{

    // TODO: 在此添加控件通知处理程序代码

    typedef CExportTest* (*lpCall)(CExportTest*);

    typedef int (*fCall)(void);

    //创建dll句柄  

    HINSTANCE hDll;  

    //装载dll  

    CExportTest* pInput = new CExportTest();

    pInput->m_i = 2;

    hDll = LoadLibrary(_T("DllInstenceMfc.dll"));  

    if(NULL==hDll)  

    {  

        AfxMessageBox(_T("DLL加载失败！"));  

    }  

    //检索指定DLL中的输出库函数地址  

    lpCall pFunc = NULL;

    fCall pFI = NULL;

    pFunc =(lpCall)GetProcAddress(hDll,(LPCSTR)"ExportClass");

    pFI = (fCall)GetProcAddress(hDll,(LPCSTR)"TestFunc");

    if(NULL==pFunc)  

    {  

        AfxMessageBox(_T("DLL内部函数调用失败！"));  

    }

    if(NULL==pFI)  

    {  

        AfxMessageBox(_T("DLL内部函数TestFunc调用失败！"));  

    }

    //创建DLL对话框  

    CExportTest* pDll = pFunc(pInput);

    if(pDll != NULL)

    {

        int i = pDll->ExportInt();        

        CString str;

        str.Format(_T("%d"),i);

        AfxMessageBox(str);

    }

    if(pFI != NULL)

    {

        int x = pFI();

        CString str;

        str.Format(_T("%d"),x);

        AfxMessageBox(str);

    }

    FreeLibrary(hDll);

    delete pInput;

}

下面代码不使用编译不过啊



#pragma once

class CExportTest

{

public:

	CExportTest(void);

	virtual ~CExportTest(void);

public:

	virtual int ExportInt();

	//virtual int ExportStr(int x) = 0;

public:

	int m_i;

};



#include "StdAfx.h"

#include "ExportTest.h"





CExportTest::CExportTest(void)

{

	m_i = 1;

}





CExportTest::~CExportTest(void)

{

}



int CExportTest::ExportInt(void)

{

	return m_i;

}