请教有关关机的API函数

[coolzdp]

刚学VC不久，
今天从一本书上看到控制关机的API函数，
参数分别是：
ExitWindowsEx(EWX_REBOOT,0);//重启
ExitWindowsEx(EWX_SHUTDOWN,0);//关机
ExitWindowsEx(EWX_FORCE,0);//强制关机
ExitWindowsEx(EWX_LOGOFF,0);//注销
照书上的试了一下（在WindowsXP,VC6.0下）
只有第三、四个有反应，但是执行的都是注销，
第一、二个参数没有任何效果。

不知是不是书上写得太老了，如果是的话
请教大家最新的有关重启、关机的函数是什么呢？
谢谢！

[COOL099]

就是這個.nt下光用這個不行.
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.

[jennifergiant]

HANDLE hToken;
TOKEN_PRIVILEGES tkp;

if (!OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
AfxMessageBox("OpenProcessToken failed!");

LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME, &tkp.Privileges[0].Luid);

tkp.PrivilegeCount = 1;
tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, (PTOKEN_PRIVILEGES)NULL, 0);

if (GetLastError() != ERROR_SUCCESS)
AfxMessageBox("AdjustTokenPrivileges enable failed!");

if (fClose)
ExitWindowsEx(EWX_SHUTDOWN | EWX_FORCE, 0);
else
ExitWindowsEx(EWX_REBOOT | EWX_FORCE, 0);

[jennifergiant]

fClose判断是关机还是重启

[simouse]

INT MyExitSystemFunc(int IsHow)
{
HANDLE hToken;
TOKEN_PRIVILEGES tkp;
DWORD dwVersion;

dwVersion = GetVersion(); //获得Windows NT或Win32的版本号


switch(IsHow)
{
case 0://注销
ExitWindowsEx(EWX_LOGOFF,0);
break;

case 1://重新启动
if (dwVersion < 0x80000000)
{// Windows NT系列
OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken);
LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);

tkp.PrivilegeCount = 1; // 设置一个权限
tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,(PTOKEN_PRIVILEGES)NULL, 0);

ExitWindowsEx(EWX_REBOOT | EWX_FORCE, 0);
}
else
{//Windows 95系列
ExitWindowsEx(EWX_FORCE | EWX_REBOOT,0);
}
break;

case 2://关闭计算机
if (dwVersion < 0x80000000)
{// Windows NT
OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken);
LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);

tkp.PrivilegeCount = 1; // 设置一个权限
tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,(PTOKEN_PRIVILEGES)NULL, 0);

ExitWindowsEx(EWX_POWEROFF |EWX_FORCE, 0);
}
else
{
ExitWindowsEx(EWX_FORCE | EWX_SHUTDOWN,0);
}
break;
}


return 0;
}

[jruv]

以下代码能实现注销，关闭，重起，挂起计算机以及关闭显示器，运行屏保的功能
98下使用不需要调用EnablePrivilege
//shutdown and reboot system
//uFlag=
#define SD_LOGOFF EWX_LOGOFF
#define SD_SHUTDOWN EWX_POWEROFF
#define SD_REBOOT EWX_REBOOT
#define SD_SUSPEND 0x00000020
//if bForce==false, the display is in low power.
// bForce==true , turn off the display .
#define SD_MONITOR 0x00000040
//run the current screen saver application
#define SD_SCREENSAVE 0x00000080 //the parameter bForce will be ignored

//change the privilege of this process.
BOOL EnablePrivilege(LPCTSTR lpszPrivilegeName,BOOL bEnable)
{
HANDLE hToken;
TOKEN_PRIVILEGES tkp;

if (!OpenProcessToken( GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken ) )
return FALSE;
if (!LookupPrivilegeValue(NULL,lpszPrivilegeName,& tkp.Privileges[0].Luid))
{
CloseHandle(hToken);
return FALSE;
}
tkp.PrivilegeCount = 1;
tkp.Privileges[0].Attributes =bEnable?SE_PRIVILEGE_ENABLED:0;
if ( ! AdjustTokenPrivileges(hToken, FALSE, &tkp, sizeof tkp, NULL, NULL))
{
CloseHandle(hToken);
return FALSE;
}
CloseHandle(hToken);
return TRUE;
}
//Shutdown,reboot,logout func
BOOL ShutDownSysEx(UINT uFlags,BOOL bForce)
{
BOOL bRet=TRUE;

if( uFlags & SD_SCREENSAVE )
{
return ::SendMessage(HWND_BROADCAST,WM_SYSCOMMAND,SC_SCREENSAVE,0);
}

if( uFlags & SD_MONITOR )
{
DWORD lParam=bForce? 2:1;
return ::SendMessage(HWND_BROADCAST,WM_SYSCOMMAND,SC_MONITORPOWER,lParam);
}

if( uFlags & SD_SUSPEND )
{
EnablePrivilege(SE_SHUTDOWN_NAME,TRUE);
//suspend system
bRet = SetSystemPowerState(TRUE,bForce);
EnablePrivilege(SE_SHUTDOWN_NAME,FALSE);
}
else
{
bForce?uFlags|=EWX_FORCE:uFlags&=~EWX_FORCE;

//enable the privilege of shutdow in win2000 or later
EnablePrivilege(SE_SHUTDOWN_NAME,TRUE);

if(!ExitWindowsEx( uFlags,0 ))
{
EnablePrivilege(SE_SHUTDOWN_NAME,FALSE);
bRet = FALSE;
}
}
return bRet;
}