我想写一个定时关机的程序
解决方案 »
- 怎么实现mfc基于对话框的串口通信数据接收后显示波形
- 对文件格式不懂,麻烦懂fat16格式的进来看看
- 有关工具条的问题
- windows98和XP下自己开发的USB设备的驱动程序是否不同?
- 为什么我的写的程序最小化是到左下角啊?任务栏却没有?
- 在线等待,在域控制器上如何查看域内一台计算机上当前的登陆域用户名?
- ocx和inf打包好签名了。。。仍然未验证
- dump()在mfc中干什么用地?
- 一个很菜的问题
- 请教深数学功底的大虾:随机数的生成。
- non_template collection classes?
- 如何读取位图中某一确定点的COLORREF值?又如何设置某一确定点的COLORREF值???
UINT uFlags, // shutdown operation
DWORD dwReserved // reserved
);
The ExitWindowsEx function either logs off the current user, shuts down the system, or shuts down and restarts the system. It sends the WM_QUERYENDSESSION message to all applications to determine if they can be terminated. BOOL ExitWindowsEx(
UINT uFlags, // shutdown operation
DWORD dwReserved // reserved
);
Parameters
uFlags
Specifies the type of shutdown. This parameter must include one of the following values: Value Meaning
EWX_LOGOFF Shuts down all processes running in the security context of the process that called the ExitWindowsEx function. Then it logs the user off.
EWX_POWEROFF Shuts down the system and turns off the power. The system must support the power-off feature.
Windows NT: The calling process must have the SE_SHUTDOWN_NAME privilege. For more information, see the following Res section.
EWX_REBOOT Shuts down the system and then restarts the system.
Windows NT: The calling process must have the SE_SHUTDOWN_NAME privilege. For more information, see the following Res section.
EWX_SHUTDOWN Shuts down the system to a point at which it is safe to turn off the power. All file buffers have been flushed to disk, and all running processes have stopped.
Windows NT: The calling process must have the SE_SHUTDOWN_NAME privilege. For more information, see the following Res section.
This parameter can optionally include the following values: Value Meaning
EWX_FORCE Forces processes to terminate. When this flag is set, the system does not send the WM_QUERYENDSESSION and WM_ENDSESSION messages. This can cause the applications to lose data. Therefore, you should only use this flag in an emergency.
EWX_FORCEIFHUNG Windows NT 5.0 and later: Forces processes to terminate if they do not respond to the WM_QUERYENDSESSION or WM_ENDSESSION message. This flag is ignored if EWX_FORCE is used. dwReserved
Reserved; this parameter is ignored.
Return Values
If the function succeeds, the return value is nonzero.If the function fails, the return value is zero. To get extended error information, callGetLastError. Res
The ExitWindowsEx function returns as soon as it has initiated the shutdown. The shutdown or logoff then proceeds asynchronously. During a shutdown or log-off operation, applications that are shut down are allowed a specific amount of time to respond to the shutdown request. If the time expires, the system displays a dialog box that allows the user to forcibly shut down the application, to retry the shutdown, or to cancel the shutdown request. If the EWX_FORCE value is specified, the system always forces applications to close and does not display the dialog box. If the EWX_FORCEIFHUNG value is specified, the system forces hung applications to close and does not display the dialog box. Console processes receive a separate notification message, CTRL_SHUTDOWN_EVENT or CTRL_LOGOFF_EVENT, as the situation warrants. A console process routes these messages to its HandlerRoutine functions, which are added and removed by calls to the SetConsoleCtrlHandler function. ExitWindowsEx sends these notification messages asynchronously; thus, an application cannot assume that the console notification messages have been handled when a call to ExitWindowsEx returns. Windows NT: To shut down or restart the system, the calling process must use theAdjustTokenPrivileges function to enable the SE_SHUTDOWN_NAME privilege. For more information about security privileges, seePrivileges. Windows 95: ExitWindowEx does not work from a console application, as it does on Windows NT. QuickInfo
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in winuser.h.
Import Library: Use user32.lib.See Also
System Shutdown Overview, System Shutdown Functions,AdjustTokenPrivileges,HandlerRoutine,SetConsoleCtrlHandler
HANDLE hToken;
TOKEN_PRIVILEGES tkp;
// Get a token for this process.
if (!OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
error("OpenProcessToken");
// Get the LUID for the shutdown privilege.
LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,
&tkp.Privileges[0].Luid);
tkp.PrivilegeCount = 1; // one privilege to set
tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
// Get the shutdown privilege for this process.
AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,
(PTOKEN_PRIVILEGES)NULL, 0);
// Cannot test the return value of AdjustTokenPrivileges.
if (GetLastError() != ERROR_SUCCESS)
error("AdjustTokenPrivileges");
// Shut down the system and force all applications to close.
if (!ExitWindowsEx(EWX_SHUTDOWN | EWX_FORCE, 0))
error("ExitWindowsEx");