我的菜单的双重缓冲

我使用以下代码在我的应用程序中实现了双缓冲。在病房之后，我发现我的子窗口（即屁股）没有像正常那样进行动画处理，所以我WS_EX_COMPOSITED添加到我的父窗口中，子窗口现在正在正确设置动画。但是，添加WS_EX_COMPOSITED后，从我的资源创建的菜单是黑色的，无法正确显示。

那么，如何在我的顶部菜单中添加双缓冲？

MainWinHwnd = CreateWindowEx(WS_EX_COMPOSITED, MainWinClassName, MainWinTitle,
WS_VISIBLE|WS_BORDER|WS_SYSMENU|WS_MINIMIZEBOX|WS_MAXIMIZEBOX|WS_SIZEBOX|WS_CLIPCHILDREN,
        NULL, NULL, 609, 440, NULL, NULL, hInstance, NULL);
    if (!MainWinHwnd) return FALSE;
case WM_PAINT:
    {
        RECT WinRt;
        RECT TxtRt;
        HFONT TxtFont = NULL;
        SIZE TxtSize;
        HDC WinDC = GetDC(hWnd);
        GetClientRect(hWnd, &WinRt);
        HDC WinBuffer = CreateCompatibleDC(WinDC);
        HBITMAP BitBuffer = CreateCompatibleBitmap(WinDC, WinRt.right, WinRt.bottom);
        SelectObject(WinBuffer, BitBuffer);
        FillRect(WinBuffer, &WinRt, (HBRUSH) (COLOR_BTNFACE + 1));
        SetBkColor(WinBuffer, GetSysColor((COLOR_BTNFACE)));
        DrawThemeBackground(ButtonThemeData, WinBuffer, BP_GROUPBOX, GBS_NORMAL, &GroupOptionBox, NULL);
        DrawThemeBackground(DragDropThemeData, WinBuffer, RP_GRIPPER, 0, &DragDropItem, NULL);
        for (DWORD I = 0; I < sizeof(MainWinLabels) / sizeof(CustomLabel); I++)
        {
            if (MainWinLabels[I].Font == NULL)
            {
                TxtFont = CreateFontA(MainWinLabels[I].cFontHeight, NULL, NULL, NULL, FW_DONTCARE,
                    MainWinLabels[I].cFontItalic, MainWinLabels[I].cFontUnderline,
                    MainWinLabels[I].cFontStrikeOut, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
                    MainWinLabels[I].cFontQuality, DEFAULT_PITCH, MainWinLabels[I].cFontFaceName);
                if (TxtFont == NULL) continue;
                SelectObject(WinBuffer, TxtFont);
            }
            else SelectObject(WinBuffer, *MainWinLabels[I].Font);
            SetTextColor(WinBuffer, MainWinLabels[I].Color);
            TxtRt.left = MainWinLabels[I].X;
            TxtRt.top = MainWinLabels[I].Y;
            DrawTextA(WinBuffer, MainWinLabels[I].Text, strlen(MainWinLabels[I].Text), &TxtRt,
                DT_LEFT|DT_SINGLELINE|DT_NOCLIP);
            GetTextExtentPoint32A(WinBuffer, MainWinLabels[I].Text, strlen(MainWinLabels[I].Text), &TxtSize);
            MainWinLabels[I].Width = TxtSize.cx;
            MainWinLabels[I].Height = TxtSize.cy;
            if (TxtFont != NULL) DeleteObject(TxtFont);
        }
        BitBlt(WinDC, 0, 0, WinRt.right, WinRt.bottom, WinBuffer, 0, 0, SRCCOPY);
        ReleaseDC(hWnd, WinDC);
        DeleteObject(BitBuffer);
        DeleteDC(WinBuffer);
        break;
    }