[PATCH 1/4] uxtheme: Check only the lower 16 bits of the return value of WM_ERASEBKGND.

[Zhiyi Zhang]

call_dialog_proc16() truncates the return values from 16-bit application window procedures to 16
bits. Since WINPROC_CallDlgProcA() is not available in uxtheme, CallWindowProcW() is used instead
and the higher bits should be ignored as well.

Wine-Bug-Id: https://bugs.winehq.org/show_bug.cgi?id=52713
Signed-off-by: Zhiyi Zhang <zzhang(a)codeweavers.com>
---
 dlls/uxtheme/dialog.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/uxtheme/dialog.c b/dlls/uxtheme/dialog.c
index b91e20f0f33..706d170936e 100644
--- a/dlls/uxtheme/dialog.c
+++ b/dlls/uxtheme/dialog.c
@@ -129,7 +129,7 @@ LRESULT WINAPI UXTHEME_DefDlgProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp, BOO
     case WM_ERASEBKGND:
     {
         dlgproc = (WNDPROC)GetWindowLongPtrW(hwnd, DWLP_DLGPROC);
-        lr = CallWindowProcW(dlgproc, hwnd, msg, wp, lp);
+        lr = LOWORD(CallWindowProcW(dlgproc, hwnd, msg, wp, lp));
         if (lr)
             return lr;
 
-- 
2.32.0