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HANDLE hToken;
TOKEN_PRIVILEGES tkp;
if(!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
MessageBox(hWnd,_T(""),_T("OpenProcessToken"),0);
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)
MessageBox(hWnd,_T(""),_T("AdjustTokenPrivileges"),0);
if(!ExitWindowsEx(EWX_POWEROFF, 0))
MessageBox(hWnd,_T(""),_T("ExitWindowsEx"),EWX_FORCE);