From a5b6a306ae1216a67d5fa1f062cfdaee4ee7b815 Mon Sep 17 00:00:00 2001
From: Camilla Berglund <elmindreda@elmindreda.org>
Date: Wed, 13 Nov 2013 12:47:44 +0100
Subject: [PATCH] Added note.

---
 src/win32_window.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/win32_window.c b/src/win32_window.c
index 30fc1668..f9840021 100644
--- a/src/win32_window.c
+++ b/src/win32_window.c
@@ -684,6 +684,8 @@ static LRESULT CALLBACK windowProc(HWND hWnd, UINT uMsg,
                 updateClipRect(window);
             }
 
+            // NOTE: This cannot use LOWORD/HIWORD recommended by MSDN, as
+            // those macros do not handle negative window positions correctly
             _glfwInputWindowPos(window,
                                 GET_X_LPARAM(lParam),
                                 GET_Y_LPARAM(lParam));