Filip and Richard are both smoking something.

Replaced syntax error and incorrect inversion. 

dwUnknown is a reserved parameter (dwReserved is more correct) that is never used, but it's still incorrect to pass 0 because we should respect what the user is sending us.

reactos/lib/user32/misc

diff -u -r1.11 -r1.12
--- misc.c	6 Dec 2004 07:14:47 -0000	1.11
+++ misc.c	6 Dec 2004 08:41:38 -0000	1.12
@@ -16,7 +16,7 @@

  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

-/* $Id: misc.c,v 1.11 2004/12/06 07:14:47 rcampbell Exp $

+/* $Id: misc.c,v 1.12 2004/12/06 08:41:38 ion Exp $

  *
  * PROJECT:         ReactOS user32.dll
  * FILE:            lib/user32/misc/misc.c

@@ -113,5 +113,5 @@

    DWORD dwReserved,
    BOOL bEnable)
 {

-   return NtUserUpdatePerUserSystemParameters(0, dwReserved);

+   return NtUserUpdatePerUserSystemParameters(dwReserved, bEnable);

 }