From 5b803350e90028279e1dbd0013125550f19c84c5 Mon Sep 17 00:00:00 2001
From: Ulrich Weigand <weigand@informatik.uni-erlangen.de>
Date: Tue, 16 Mar 1999 10:29:55 +0000
Subject: [PATCH] Ignore HIWORD of boolean return values of 16-bit hook
 procedures, to match buggy Windows behaviour.

---
 windows/hook.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/windows/hook.c b/windows/hook.c
index 81feb35b664..3fa7db8be46 100644
--- a/windows/hook.c
+++ b/windows/hook.c
@@ -995,6 +995,15 @@ static LRESULT HOOK_CallHook( HANDLE16 hook, INT fromtype, INT code,
 
     ret = data->proc(code, wParam, lParam);
 
+    /* Grrr. While the hook procedure is supposed to have an LRESULT return
+       value even in Win16, it seems that for those hook types where the 
+       return value is interpreted as BOOL, Windows doesn't actually check
+       the HIWORD ...  Some buggy Win16 programs, notably WINFILE, rely on
+       that, because they neglect to clear DX ... */
+    if (    (data->flags & HOOK_MAPTYPE) == HOOK_WIN16 
+         && data->id != WH_JOURNALPLAYBACK )
+        ret = LOWORD( ret );
+
     TRACE(hook, "Ret hook %04x = %08lx\n", hook, ret );
 
     data->flags &= ~HOOK_INUSE;