[PATCH 4/5] uxtheme: Do not call SetWindowTheme() in EnableThemeDialogTexture().

[Zhiyi Zhang]

It's no longer necessary to call SetWindowTheme() in EnableThemeDialogTexture() because dialog
theming doesn't need to open theme handles associated with the dialog. Calling SetWindowTheme() also
sends extra messages.

Signed-off-by: Zhiyi Zhang <zzhang(a)codeweavers.com>
---
 dlls/uxtheme/draw.c         | 7 +------
 dlls/uxtheme/tests/system.c | 4 ++--
 2 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/dlls/uxtheme/draw.c b/dlls/uxtheme/draw.c
index 04ea1e79df9..a7942b03f97 100644
--- a/dlls/uxtheme/draw.c
+++ b/dlls/uxtheme/draw.c
@@ -60,12 +60,7 @@ HRESULT WINAPI EnableThemeDialogTexture(HWND hwnd, DWORD dwFlags)
     res = SetPropW (hwnd, (LPCWSTR)MAKEINTATOM(atDialogThemeEnabled), 
                     UlongToHandle(dwFlags|0x80000000));
         /* 0x80000000 serves as a "flags set" flag */
-    if (!res)
-          return HRESULT_FROM_WIN32(GetLastError());
-    if (dwFlags & ETDT_USETABTEXTURE)
-        return SetWindowTheme (hwnd, NULL, L"Tab");
-    else
-        return SetWindowTheme (hwnd, NULL, NULL);
+    return res ? S_OK : HRESULT_FROM_WIN32(GetLastError());
  }
 
 /***********************************************************************
diff --git a/dlls/uxtheme/tests/system.c b/dlls/uxtheme/tests/system.c
index 3f8f32a9a7b..03e435eb463 100644
--- a/dlls/uxtheme/tests/system.c
+++ b/dlls/uxtheme/tests/system.c
@@ -2018,7 +2018,7 @@ static void test_EnableThemeDialogTexture(void)
             hr = EnableThemeDialogTexture(dialog, flags[i]);
             ok(hr == S_OK, "EnableThemeDialogTexture failed, hr %#x.\n", hr);
             ok_sequence(sequences, PARENT_SEQ_INDEX, empty_seq,
-                        "EnableThemeDialogTexture first flag", TRUE);
+                        "EnableThemeDialogTexture first flag", FALSE);
             ret = IsThemeDialogTextureEnabled(dialog);
             /* Non-zero flags without ETDT_DISABLE enables dialog texture */
             todo_wine_if(flags[i] == ETDT_USETABTEXTURE || flags[i] == ETDT_USEAEROWIZARDTABTEXTURE)
@@ -2040,7 +2040,7 @@ static void test_EnableThemeDialogTexture(void)
             hr = EnableThemeDialogTexture(dialog, flags[j]);
             ok(hr == S_OK, "EnableThemeDialogTexture failed, hr %#x.\n", hr);
             ok_sequence(sequences, PARENT_SEQ_INDEX, empty_seq,
-                        "EnableThemeDialogTexture second flag", TRUE);
+                        "EnableThemeDialogTexture second flag", FALSE);
             ret = IsThemeDialogTextureEnabled(dialog);
             /* If the flag is zero, it will have previous dialog texture status */
             if (flags[j])
-- 
2.32.0