Код

ExitWindowsEx(EWX_SHUTDOWN, 0);

Это в 98 виндах, а как в ХР преобразовать?

BOOL MySystemShutdown()
{
HANDLE hToken;
TOKEN_PRIVILEGES tkp;

// Get a token for this process.

if (!OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
return( FALSE );

// 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);

if (GetLastError() != ERROR_SUCCESS)
return FALSE;

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

if (!ExitWindowsEx(EWX_SHUTDOWN | EWX_FORCE, 0))
return FALSE;

return TRUE;
}

Source: MSDN

Thank`s!