VC中枚举所有的任务,任务管理器的一些资料的整理

1.列举所有的任务

调用EnumWindows这个函数
BOOL EnumWindows(
WNDENUMPROC lpEnumFunc, // callback function
LPARAM lParam            // application-defined value
);
如:
::EnumWindows((WNDENUMPROC)enumProc,(LPARAM)this);

enumProc就是那个回调函数,真正的操作,都在这个函数里实现
第二个参数,是用户自定义传送的,比如这里,可以是对话框的指针

enumProc的原型是
BOOL CALLBACK CPListDlg::enumProc(HWND hwnd, LPARAM lParam)
如果是类成员函数,必须是static函数,声明如下
BOOL static CALLBACK enumProc(HWND hwnd, LPARAM lParam);
其中,那个HWND hwnd就是窗口句柄

BOOL CALLBACK CPListDlg::enumProc(HWND hwnd, LPARAM lParam)
{
CPListDlg * pDlg = (CPListDlg *)lParam;

if (hwnd == NULL)
{
return FALSE;
}

if (hwnd == pDlg->m_hWnd) //这是为了不把自己这个程序列出来,呵呵
{
return TRUE;
}

if (::IsWindow(hwnd) && ::IsWindowVisible(hwnd) && ((GetWindowLong(hwnd, GWL_EXSTYLE)&WS_EX_TOOLWINDOW)!

=WS_EX_TOOLWINDOW) &&
(GetWindowLong(hwnd, GWL_HWNDPARENT)==0))
{
TCHAR szCap[255] = ;

::GetWindowText(hwnd, szCap, 255);

if (strlen(szCap) == 0)
{
return TRUE;
}
if (lstrcmp(_T(“Program Manager”),szCap) == 0)
{
return TRUE;
}

DWORD dwProcessID = 0;
::GetWindowThreadProcessId(hwnd,&dwProcessID);

TRACE( “id = %d, name = %sn”, dwProcessID, szCap );

}
return TRUE;

}

GetWindowThreadProcessId是获取进行的ID的

if (lstrcmp(_T(“Program Manager”),szCap) == 0)

是为了区别出Program Manager这个程序,不知道为什么,会列出这个东西来,晕

2.获取窗口的图标

HICON hIcon = NULL;

hIcon = (HICON)::GetClassLong(hwnd,GCL_HICONSM);

if(hIcon == NULL)
{
hIcon = (HICON)::GetClassLong(hwnd,GCL_HICON);
}

if(hIcon == NULL)
{
hIcon = (HICON)::SendMessage(hwnd, WM_GETICON, ICON_SMALL, 0);
}

if(hIcon == NULL)
{
hIcon = (HICON)::SendMessage(hwnd, WM_GETICON, ICON_BIG, 0);
}

记得当时做的时候,有这些代码是因为,有些窗口的图标不能获得,用了上述办法以后,才能全部获得

3.判断窗口是否是正常运行还是未响应的
首先定义两个函数指针,
typedef BOOL (WINAPI *PROCISHUNGAPPWINDOW)(HWND);
typedef BOOL (WINAPI *PROCISHUNGTHREAD)(DWORD);

然后定义
PROCISHUNGAPPWINDOW    m_pIsHungAppWindow;
PROCISHUNGTHREAD    m_pIsHungThread;

定义一个bool型,来判断当前操作系统是否是Windows NT/2000以上
因为不同的操作系统,判断程序是否运行正常的方式是不一样的

BOOL                        m_bIsNT;

获取版本信息
OSVERSIONINFO osver = ;

osver.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
if (!GetVersionEx(&osver))
{
bRetVal = FALSE;
}

if(bRetVal == TRUE)
{
if (osver.dwPlatformId&VER_PLATFORM_WIN32_NT)
{
m_bIsNT = TRUE;
}
else
{
m_bIsNT = FALSE;
}

}

获取那两个函数指针
HMODULE hUser32 = ::GetModuleHandle(“user32″);

if (!hUser32)
{
bRetVal = FALSE;
}
if(bRetVal == TRUE)
{
m_pIsHungAppWindow = (PROCISHUNGAPPWINDOW)
GetProcAddress( hUser32,
“IsHungAppWindow” );

m_pIsHungThread = (PROCISHUNGTHREAD) GetProcAddress( hUser32,
“IsHungThread” );

if (!m_pIsHungAppWindow && !m_pIsHungThread)
{
bRetVal = FALSE;
}

}

于是判断,窗口是否是正常运行,还是未响应
代码如下

if(m_bIsNT == TRUE)
{
BOOL bIsHung = m_pIsHungAppWindow(hwnd);
if(bIsHung)

else

}
else
{
BOOL bIsHung =m_pIsHungThread(GetWindowThreadProcessId(hwnd,NULL));
if(bIsHung)

else

}

4.结束任务
::PostMessage(hwnd,WM_CLOSE,0,0);

不过调用这个,有时候不一定一下能把窗口关了,比如窗口没响应了,就关不了
于是,得继续想办法

::PostMessage(hwnd,WM_CLOSE,0,0);
::Sleep(300);
//如果窗口还没有被关,继续想办法
if(::IsWindow(hwnd))
{
DWORD dwProcessID = 0;
::GetWindowThreadProcessId(hwnd,&dwProcessID);

if(TerminateApp(dwProcessID,500) != TA_FAILED)
{
//结束成功了
}

}

TerminateApp是这样的

DWORD WINAPI CPListDlg::TerminateApp( DWORD dwPID, DWORD dwTimeout )
{
HANDLE   hProc ;
DWORD   dwRet ;

// If we can’t open the process with PROCESS_TERMINATE rights,
// then we give up immediately.
hProc = ::OpenProcess(SYNCHRONIZE|PROCESS_TERMINATE, FALSE,
dwPID);

if(hProc == NULL)
{
return TA_FAILED ;
}

// TerminateAppEnum() posts WM_CLOSE to all windows whose PID
// matches your process’s.
EnumWindows((WNDENUMPROC)TerminateAppEnum, (LPARAM) dwPID) ;

// Wait on the handle. If it signals, great. If it times out,
// then you kill it.
if(WaitForSingleObject(hProc, dwTimeout)!=WAIT_OBJECT_0)
dwRet=(TerminateProcess(hProc,0)?TA_SUCCESS_KILL:TA_FAILED);
else
dwRet = TA_SUCCESS_CLEAN ;

CloseHandle(hProc) ;

return dwRet ;

}

又有一个回调函数

BOOL CALLBACK CPListDlg::TerminateAppEnum( HWND hwnd, LPARAM lParam )
{
DWORD dwID ;

::GetWindowThreadProcessId(hwnd, &dwID) ;

if(dwID == (DWORD)lParam)
{
::PostMessage(hwnd, WM_CLOSE, 0, 0) ;
}

return TRUE ;

}
原型是
BOOL static CALLBACK TerminateAppEnum( HWND hwnd, LPARAM lParam ) ;

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