From 81497c6db44126e41f948489e46191a7b994f67a Mon Sep 17 00:00:00 2001
From: halx99 <halx99@live.com>
Date: Sat, 25 Jun 2016 01:41:20 +0800
Subject: [PATCH] #fix: disable system default ALT process

solve dead block problem when glfw-window is a cross-thread child window.
---
 src/win32_window.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/win32_window.c b/src/win32_window.c
index f46a44a6e..931417e7e 100644
--- a/src/win32_window.c
+++ b/src/win32_window.c
@@ -566,7 +566,10 @@ static LRESULT CALLBACK windowProc(HWND hWnd, UINT uMsg,
             else
                 _glfwInputKey(window, key, scancode, action, mods);
 
-            break;
+            if(wParam == VK_MENU) {
+                return 0;
+            }
+            break; // #fix: disable system default ALT process, solve dead block problem when glfw-window is a cross-thread child window.
         }
 
         case WM_LBUTTONDOWN: