support the WS_EX_LEFTSCROLLBAR

reactos/subsys/win32k/ntuser

diff -u -r1.30 -r1.31
--- scrollbar.c	17 Apr 2004 11:00:14 -0000	1.30
+++ scrollbar.c	5 May 2004 13:58:59 -0000	1.31
@@ -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: scrollbar.c,v 1.30 2004/04/17 11:00:14 weiden Exp $

+/* $Id: scrollbar.c,v 1.31 2004/05/05 13:58:59 weiden Exp $

  *
  * COPYRIGHT:        See COPYING in the top level directory
  * PROJECT:          ReactOS kernel

@@ -89,9 +89,17 @@

       break;
 
     case SB_VERT:

-      lprect->left = ClientRect.right - WindowRect.left;

+      if(Window->ExStyle & WS_EX_LEFTSCROLLBAR)
+      {
+        lprect->right = ClientRect.left - WindowRect.left;
+        lprect->left = lprect->right - NtUserGetSystemMetrics(SM_CXVSCROLL);
+      }
+      else
+      {
+        lprect->left = ClientRect.right - WindowRect.left;
+        lprect->right = lprect->left + NtUserGetSystemMetrics(SM_CXVSCROLL);
+      }

       lprect->top = ClientRect.top - WindowRect.top;

-      lprect->right = lprect->left + NtUserGetSystemMetrics(SM_CXVSCROLL);

       lprect->bottom = ClientRect.bottom - WindowRect.top;
       vertical = TRUE;
       break;