关闭计算机 -优快云博客

博客给出了一段代码用于实现不同Windows系统下的关机功能。代码先判断操作系统版本，若为win2000，获取进程令牌、关机权限等操作后关机；若为win98，则直接执行关机操作，过程中会对可能出现的错误进行提示。

void ShutDown()
{
//判断操作系统版本
OSVERSIONINFO osVer;
osVer.dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
::GetVersionEx(&osVer);

//操作系统为win2000
if(osVer.dwPlatformId==VER_PLATFORM_WIN32_NT)
{
// Get a token for this process.
HANDLE hToken;
TOKEN_PRIVILEGES tkp;
if (!OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
MessageBox("OpenProcessToken Error");

// 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)
MessageBox("AdjustTokenPrivileges Error");

// Shut down the system and force all applications to close.

if (!ExitWindowsEx(EWX_POWEROFF|EWX_FORCE, 0))
MessageBox("ExitWindowsEx Error");
}
//操作系统为win98
else
if (!ExitWindowsEx(EWX_SHUTDOWN|EWX_FORCE, 0))
MessageBox("SHUTDOWN Error");
}