From bc02e8551f7fb07c49d5bfd1e3865bca6f157fd2 Mon Sep 17 00:00:00 2001
From: Derek Lesho <dlesho@codeweavers.com>
Date: Tue, 12 Nov 2019 14:50:16 -0600
Subject: [PATCH] winex11: Set the scan code prefix when necessary.

Signed-off-by: Derek Lesho <dlesho@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
---
 dlls/winex11.drv/keyboard.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/dlls/winex11.drv/keyboard.c b/dlls/winex11.drv/keyboard.c
index 131c5f5442f..48da12c0292 100644
--- a/dlls/winex11.drv/keyboard.c
+++ b/dlls/winex11.drv/keyboard.c
@@ -2107,6 +2107,11 @@ UINT CDECL X11DRV_MapVirtualKeyEx(UINT wCode, UINT wMapType, HKL hkl)
                     break;
                 }
             }
+
+            /* set scan code prefix */
+            if (wMapType == MAPVK_VK_TO_VSC_EX &&
+                (wCode == VK_RCONTROL || wCode == VK_RMENU))
+                ret |= 0xe000;
             break;
 
         case MAPVK_VSC_TO_VK: /* scan-code to vkey-code */