通过写代码，attach程序中创建的其他进程，将其加入VS的Debugger，以方便调试

主要功能函数:AttachProcess，DettachProcess

AttachProcess将进程加入到debugger以方便调试，

DettachProcess杀掉进程。

使用方法：在需要调试时调用AttachProcess，在中断调试时调用DettachProcess杀掉进程。

函数实现：

/**

把进程attch给debugger

lpWndName，进程的窗口名字

*/
DWORD AttachProcess(LPCWSTR lpWndName)
{
HWND hWnd = NULL;
DWORD hInstance = -1;
hWnd = FindWindow(NULL, lpWndName); //根据进程窗口名字找到进程窗口句柄
if (NULL != hWnd)
{
GetWindowThreadProcessId(hWnd, &hInstance); //根据进程窗口句柄获取进程的PID
if (hInstance > 32)
{
if (0 == DebugActiveProcess((DWORD)hInstance)) //将进程attach给debugger
{
printf("debug active process failed!");
}
else
{
printf("debug active process success!");
}
}
}

return hInstance; // 返回进程PID
}

/**

根据进程的PID，杀掉进程

*/

void DettachProcess(DWORD hInstance)
{
HANDLE hProcess = NULL;
hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, hInstance); //根据进程PID获取进程句柄
TerminateProcess(hProcess, 0); //根据进程句柄杀掉进程，这样与debugger就分开了
}

测试工程，请到我的资源列表中下载，《一个简单的可以Debug用CreateProcess创建的进程例子》。

例子工程源码地址：http://download.csdn.net/source/2519155

现贴出主要测试代码mainfrm.cpp

// MainFrm.cpp : implementation of the CMainFrame class
//

#include "stdafx.h"
#include "test.h"

#include "MainFrm.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

/**

把进程attch给debugger

lpWndName，进程的窗口名字

*/
DWORD AttachProcess(LPCWSTR lpWndName)
{
HWND hWnd = NULL;
DWORD hInstance = -1;
hWnd = FindWindow(NULL, lpWndName); //根据进程窗口名字找到进程窗口句柄
if (NULL != hWnd)
{
GetWindowThreadProcessId(hWnd, &hInstance); //根据进程窗口句柄获取进程的PID
if (hInstance > 32)
{
if (0 == DebugActiveProcess((DWORD)hInstance)) //将进程attach给debugger
{
printf("debug active process failed!");
}
else
{
printf("debug active process success!");
}
}
}

return hInstance; // 返回进程PID
}

/**

根据进程的PID，杀掉进程

*/

void DettachProcess(DWORD hInstance)
{
HANDLE hProcess = NULL;
hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, hInstance); //根据进程PID获取进程句柄
TerminateProcess(hProcess, 0); //根据进程句柄杀掉进程，这样与debugger就分开了
}

// CMainFrame

IMPLEMENT_DYNAMIC(CMainFrame, CMDIFrameWnd)

BEGIN_MESSAGE_MAP(CMainFrame, CMDIFrameWnd)
ON_WM_CREATE()
END_MESSAGE_MAP()

static UINT indicators[] =
{
ID_SEPARATOR, // status line indicator
ID_INDICATOR_CAPS,
ID_INDICATOR_NUM,
ID_INDICATOR_SCRL,
};

static DWORD hInstance = -1;

// CMainFrame construction/destruction

CMainFrame::CMainFrame()
{
// TODO: add member initialization code here
::ShellExecute(NULL, L"open", L"F://projects//test//debug//test3.exe", NULL, NULL, SW_SHOW); // 启动test3.exe

//等待test3.exe启动完毕
while(1)
{
HWND hWnd = ::FindWindow(NULL, L"test3");
if (hWnd != NULL)
{
break;
}
}
}

CMainFrame::~CMainFrame()
{

//如果调用了DebugSetProcessKillOnExit(FALSE)，则调用下面的函数将attatch上的进程干掉
DettachProcess(hInstance);

}

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CMDIFrameWnd::OnCreate(lpCreateStruct) == -1)
return -1;

if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP
| CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||
!m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
{
TRACE0("Failed to create toolbar/n");
return -1; // fail to create
}

if (!m_wndStatusBar.Create(this) ||
!m_wndStatusBar.SetIndicators(indicators,
sizeof(indicators)/sizeof(UINT)))
{
TRACE0("Failed to create status bar/n");
return -1; // fail to create
}

// TODO: Delete these three lines if you don't want the toolbar to be dockable
m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
EnableDocking(CBRS_ALIGN_ANY);
DockControlBar(&m_wndToolBar);

hInstance = AttachProcess(L"test3"); // 将test3.exe加入调试

//DebugSetProcessKillOnExit(FALSE); // 调试结束或是中断，并不关闭test3.exe，VS默认调试结束时会关闭其attach上的进程

return 0;
}

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
if( !CMDIFrameWnd::PreCreateWindow(cs) )
return FALSE;
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs

return TRUE;
}

// CMainFrame diagnostics

#ifdef _DEBUG
void CMainFrame::AssertValid() const
{
CMDIFrameWnd::AssertValid();
}

void CMainFrame::Dump(CDumpContext& dc) const
{
CMDIFrameWnd::Dump(dc);
}

#endif //_DEBUG

// CMainFrame message handlers

以下测试结果截图，test3.exe已经被我们写的code加入到了VS调试器中，如果test3.exe程序的调试也存在，就可以进入到test3.exe进行调试了。