From 475bfa92308b52d6fc307f376d617697f8d95ae2 Mon Sep 17 00:00:00 2001
From: Albrecht Schlosser <albrechts.fltk@online.de>
Date: Mon, 7 Oct 2024 18:14:19 +0200
Subject: [PATCH] Define missing macro on Windows/MinGW platform

... as reported today by Ian on fltk.general in thread
"Mingw-32 compile issue with new 4/5 mousebutton hooks (fltk-1.4)"
---
 src/Fl_win32.cxx | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Fl_win32.cxx b/src/Fl_win32.cxx
index 06e9d5eee..adaf598c6 100644
--- a/src/Fl_win32.cxx
+++ b/src/Fl_win32.cxx
@@ -90,6 +90,12 @@ void fl_cleanup_dc_list(void);
 # include <wchar.h>
 #endif
 
+// old versions of MinGW lack definition of GET_XBUTTON_WPARAM:
+
+#ifndef GET_XBUTTON_WPARAM
+#define GET_XBUTTON_WPARAM(wParam) (HIWORD(wParam))
+#endif
+
 static bool is_dpi_aware = false;
 
 extern bool fl_clipboard_notify_empty(void);