- F4 key flips the listbox in default (not extended UI) mode.

reactos/lib/user32/controls

diff -u -r1.19 -r1.20
--- combo.c	15 Aug 2004 21:36:26 -0000	1.19
+++ combo.c	27 Nov 2004 16:38:28 -0000	1.20
@@ -2003,6 +2003,11 @@

 		   CBRollUp( lphc, wParam == VK_RETURN, FALSE );
 		   return TRUE;
 		}

+		else if ((wParam == VK_F4) && !(lphc->wState & CBF_EUI))
+		{
+		   COMBO_FlipListbox( lphc, FALSE, FALSE );
+		   return TRUE;
+		}

 
 		if( lphc->wState & CBF_EDIT )
 		    hwndTarget = lphc->hWndEdit;