程序开发中，经常会使用到动态库，动态库不能直接运行，需要依赖其他程序调用，那么我们该如何调试我们的动态库呢？本文通过一个简单的例子说明。
使用工具：VS2008
使用语言：C++
开发步骤：
struct tDLL_INFORMATION
{
LPCTSTR sDLLName;
LPCTSTR sFuncDescr;
LPCTSTR sAuthorName;
};
typedef bool (*LPFNREGISTER_CreateObject)(void**);
typedef bool (*LPFNREGISTER_GetDllInformation)(void**);
typedef bool (*LPFNREGISTER_ReleaseObject)(void*);void CDllTestAppDlg::OnBnClickedBtnLoad()
{
CString s1 = _T(""), s=_T("");
s = _T("dll files(*.dll)|*.dll|所有文件(*.*)|*.*||");
CFileDialog de(true, s1, NULL, OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT | OFN_NOCHANGEDIR,s, NULL );
if(de.DoModal() == IDOK)
{
m_sDllPathName = de.GetPathName(); //path and filename
}
else
{
return;
}
if(m_sDllPathName.IsEmpty())
{
m_btnRunDll.EnableWindow(FALSE);
}
else
{
m_btnRunDll.EnableWindow(TRUE);
}
CString str = _T("");
int cnt = 0,i = 0;
char p[256]={0};
LPFNREGISTER_GetDllInformation lpfnRegister;
HINSTANCE hInDll = NULL;
hInDll = LoadLibrary(m_sDllPathName);
str = _T("GetDllInformation");
cnt = str.GetLength();
for(i=0; i<cnt; i++)
{
p[i] = str.GetAt(i);
}
lpfnRegister=(LPFNREGISTER_GetDllInformation)GetProcAddress(hInDll,p);
tDLL_INFORMATION* pInfo = NULL;
(*lpfnRegister)((void**)&pInfo);
str = pInfo->sDLLName;
m_sDLLName = _T("");
cnt = str.GetLength();
for(i=0;i<cnt;i++)
{
m_sDLLName = m_sDLLName + str.GetAt(i);
}
str = pInfo->sFuncDescr;
m_sFuncDescr = _T("");
cnt = str.GetLength();
for(i=0;i<cnt;i++)
{
m_sFuncDescr = m_sFuncDescr + str.GetAt(i);
}
str = pInfo->sAuthorName;
m_sAuthorName = _T("");
cnt = str.GetLength();
for(i=0;i<cnt;i++)
{
m_sAuthorName = m_sAuthorName + str.GetAt(i);
}
FreeLibrary(hInDll);
UpdateData(0);
}效果
MyDllService.h
#pragma once
#define ERR_SER_OK 0x0000
#define ERR_SER_RUN_FAILED 0x0001
#define ERR_SER_RUN_CANCEL 0x0002
#define ERR_SER_LOAD_PARAM 0x0003
class CMyDllService
{
public:
CMyDllService(void){};
~CMyDllService(void){};
public:
virtual DWORD RunService(){return ERR_SER_RUN_FAILED;};
};
调用
void CDllTestAppDlg::OnBnClickedBtnRun()
{
if(m_sDllPathName.IsEmpty())
{
MessageBox(_T("DLL路径为空。"));
return;
}
CMyDllService* pSer = NULL;
HINSTANCE hIn = NULL;
hIn = LoadLibrary(m_sDllPathName);
if(hIn != INVALID_HANDLE_VALUE)
{}
else
{
CString info = _T("载入") + m_sDllPathName + _T("失败");
MessageBox(info);
return;
}
CString str = _T("");
int cnt = 0,i = 0;
char p[256]={0};
str = _T("CreateObject");
cnt = str.GetLength();
for(i=0; i<cnt; i++)
{
p[i] = str.GetAt(i);
}
LPFNREGISTER_CreateObject lpfnRegister;
lpfnRegister=(LPFNREGISTER_CreateObject)GetProcAddress(hIn,p);
bool result = false;
if(lpfnRegister)
{
result =(*lpfnRegister)((void**)&(pSer));
}
else
{
FreeLibrary(hIn);
CString info = _T("载入") + m_sDllPathName + _T("失败");
MessageBox(info);
return;
}
if(pSer && result)
{
DWORD dwError = 0;
dwError = pSer->RunService();
}
else
{
FreeLibrary(hIn);
CString info = _T("运行") + m_sDllPathName + _T("失败");
MessageBox(info);
return;
}
char p2[256]={0};
str = _T("ReleaseObject");
cnt = str.GetLength();
for(i=0; i<cnt; i++)
{
p2[i] = str.GetAt(i);
}
LPFNREGISTER_ReleaseObject lpfnRegister1;
lpfnRegister1=(LPFNREGISTER_ReleaseObject)GetProcAddress(hIn,p2);
if(lpfnRegister1)
{
result =(*lpfnRegister1)((void*)pSer);
pSer = NULL;
}
FreeLibrary(hIn);
}效果
1.4文件结构图
设置属性为在静态库中使用
#pragma once
#include "mydllservice.h"
class CMyDlgDllService : public CMyDllService
{
public:
CMyDlgDllService(void);
~CMyDlgDllService(void);
DWORD RunService(void);
};#include "StdAfx.h"
#include "MyDlgDllService.h"
#include "TestDlg.h"
CMyDlgDllService::CMyDlgDllService(void)
{
}
CMyDlgDllService::~CMyDlgDllService(void)
{
}
DWORD CMyDlgDllService::RunService(void)
{
CTestDlg dlg;
dlg.DoModal();
return ERR_SER_OK;
}
struct tDLL_INFORMATION
{
LPCTSTR sDLLName;
LPCTSTR sFuncDescr;
LPCTSTR sAuthorName;
};
extern "C"
__declspec(dllexport) bool CreateObject(void** pObj )
{
*pObj = new CMyDlgDllService;
return true;
}
extern "C"
__declspec(dllexport) bool GetDllInformation(void** pInfo)
{
*pInfo = new tDLL_INFORMATION;
((tDLL_INFORMATION*)(*pInfo))->sDLLName = _T("dll");
((tDLL_INFORMATION*)(*pInfo))->sFuncDescr = _T("dll test");
((tDLL_INFORMATION*)(*pInfo))->sAuthorName = _T("tester");
return true;
}
extern "C"
__declspec(dllexport) bool ReleaseObject(void* pObj)
{
CMyDlgDllService* pTempObj = NULL;
pTempObj = (CMyDlgDllService*)pObj;
delete pTempObj;
return true;
}
原文地址：http://blog.csdn.net/bingdianlanxin/article/details/42341673
