Added basic working stubs of new Windows 2000 API functions.

diff --git a/windows/clipboard.c b/windows/clipboard.c
index 0e94562..0184d4e 100644
--- a/windows/clipboard.c
+++ b/windows/clipboard.c
@@ -1297,3 +1297,19 @@
     return -1;
 }
 
+
+/**************************************************************************
+ *             GetClipboardSequenceNumber   (USER32)
+ * Supported on Win2k/Win98
+ * MSDN: Windows clipboard code keeps a serial number for the clipboard
+ * for each window station.  The number is incremented whenever the
+ * contents change or are emptied.
+ * If you do not have WINSTA_ACCESSCLIPBOARD then the function returns 0
+ */
+DWORD WINAPI GetClipboardSequenceNumber(VOID)
+{
+	FIXME("Returning 0, see windows/clipboard.c\n");
+	/* FIXME: Use serial numbers */
+	return 0;
+}
+
diff --git a/windows/winpos.c b/windows/winpos.c
index f8feddd..109b73e 100644
--- a/windows/winpos.c
+++ b/windows/winpos.c
@@ -986,6 +986,28 @@
 
 
 /*******************************************************************
+ *         AllowSetForegroundWindow    (USER32)
+ */
+BOOL WINAPI AllowSetForegroundWindow( DWORD procid )
+{
+    /* FIXME: If Win98/2000 style SetForegroundWindow behavior is
+     * implemented, then fix this function. */
+    return TRUE;
+}
+
+
+/*******************************************************************
+ *         LockSetForegroundWindow    (USER32)
+ */
+BOOL WINAPI LockSetForegroundWindow( UINT lockcode )
+{
+    /* FIXME: If Win98/2000 style SetForegroundWindow behavior is
+     * implemented, then fix this function. */
+    return TRUE;
+}
+
+
+/*******************************************************************
  *         GetShellWindow16    (USER.600)
  */
 HWND16 WINAPI GetShellWindow16(void)