[PATCH v3 2/4] winemac: Set the scan code prefix when necessary.

[Derek Lesho]

Signed-off-by: Derek Lesho 
---
 dlls/winemac.drv/keyboard.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/dlls/winemac.drv/keyboard.c b/dlls/winemac.drv/keyboard.c
index aed4ff0d6e..b1f8d1cba5 100644
--- a/dlls/winemac.drv/keyboard.c
+++ b/dlls/winemac.drv/keyboard.c
@@ -1367,7 +1367,7 @@ BOOL CDECL macdrv_GetKeyboardLayoutName(LPWSTR name)
 UINT CDECL macdrv_MapVirtualKeyEx(UINT wCode, UINT wMapType, HKL hkl)
 {
     struct macdrv_thread_data *thread_data = macdrv_init_thread_data();
-    UINT ret = 0;
+    UINT ret = 0, prefix = 0;
     int keyc;

TRACE("wCode=0x%x, wMapType=%d, hkl %p\n", wCode, wMapType, hkl);
@@ -1392,6 +1392,13 @@ UINT CDECL macdrv_MapVirtualKeyEx(UINT wCode, UINT wMapType, HKL hkl)
                     break;
                 }
             }
+
+            /* set scan code prefix */
+            if (wCode == VK_RCONTROL || wCode == VK_RMENU)
+                prefix = 0xE0;
+
+            if (wMapType == MAPVK_VK_TO_VSC_EX)
+                ret |= ((prefix << 8) & 0xFF00);
             break;

case MAPVK_VSC_TO_VK: /* scan-code to vkey-code */