Update wm-message-handlers-f-k.md (MicrosoftDocs#574)

Correct date from previous change.

Author: Colin Robertson

docs/mfc/reference/wm-message-handlers-f-k.md

@@ -1,6 +1,6 @@
 ---
 title: "WM_ Message Handlers: F - K"
-ms.date: "11/04/2016"
+ms.date: "11/27/2018"
 f1_keywords: ["ON_WM_FONTCHANGE", "ON_WM_ICONERASEBKGND", "ON_WM_KEYDOWN", "ON_WM_GETMINMAXINFO", "ON_WM_KEYUP", "ON_WM_HSCROLL", "ON_WM_KILLFOCUS", "ON_WM_HSCROLLCLIPBOARD", "ON_WM_GETDLGCODE", "ON_WM_HELPINFO", "ON_WM_INITMENUPOPUP", "ON_WM_INITMENU"]
 helpviewer_keywords: ["ON_WM_HELPINFO [MFC]", "ON_WM_KILLFOCUS [MFC]", "ON_WM_GETMINMAXINFO [MFC]", "ON_WM_KEYUP [MFC]", "ON_WM_HSCROLL [MFC]", "ON_WM_INITMENUPOPUP [MFC]", "ON_WM_FONTCHANGE [MFC]", "ON_WM_ICONERASEBKGND [MFC]", "ON_WM_GETDLGCODE [MFC]", "ON_WM_HSCROLLCLIPBOARD [MFC]", "ON_WM_INITMENU [MFC]", "WM_ messages [MFC]", "ON_WM_KEYDOWN [MFC]"]
 ms.assetid: 0e7de191-1499-499f-859c-62742797808e