From dc373d2e0eb947fa789723f42edba38922925d57 Mon Sep 17 00:00:00 2001
From: Stanislav <entomolog.91@gmail.com>
Date: Tue, 10 Nov 2015 03:12:38 -0500
Subject: [PATCH] Fix for MinGW compilation

GET_XBUTTON_WPARAM is not defined on legacy MinGW.

Fixes #639.
---
 src/win32_window.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/win32_window.c b/src/win32_window.c
index 8a7211dc..1f58ce6c 100644
--- a/src/win32_window.c
+++ b/src/win32_window.c
@@ -37,6 +37,9 @@
 
 #define _GLFW_WNDCLASSNAME L"GLFW30"
 
+#ifndef GET_XBUTTON_WPARAM
+#define GET_XBUTTON_WPARAM(w) (HIWORD(w))
+#endif
 
 // Returns the window style for the specified window
 //