Windows环境下，关机和重启计算机的例子代码。

BOOL __stdcall AdjustPrivileges( LPCTSTR privilege )
{
HANDLE hToken = NULL;
TOKEN_PRIVILEGES tkp;  
BOOL bResult = FALSE;

__try
{
if( !OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken ))
{
__leave;
}

if( !LookupPrivilegeValue(NULL, privilege, &tkp.Privileges[0].Luid ))
{
__leave;
}

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

bResult = AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, (PTOKEN_PRIVILEGES) NULL, 0 );
}
__finally
{
if( NULL != hToken )
{
CloseHandle( hToken );
}
}