Здравствуйте, Mr.TurboDune, Вы писали:

[]

И еще чутка кода:

        CImageList ImageList;

        CClientDC ClientDC(m_TreeViewCtrl);
        CDC CompatibleDC;
        CompatibleDC.CreateCompatibleDC(ClientDC);

        CBitmap Bitmap;
        Bitmap.CreateCompatibleBitmap(ClientDC, iSize * 3, iSize);

        HBITMAP hOldBitmap = CompatibleDC.SelectBitmap(Bitmap);

        const COLORREF clrBgnd = ::GetSysColor(COLOR_WINDOW);//m_TreeViewCtrl.GetBkColor();
        CompatibleDC.FillSolidRect(0, 0, iSize * 3, iSize, clrBgnd);

        CRect rect(0, 0, iSize, iSize);

        CTheme Theme;
        if(CTheme::IsThemingSupported() && Theme.OpenThemeData(m_hWnd, L"Button"))
        {
            rect.OffsetRect(iSize, 0);
            Theme.DrawThemeBackground(CompatibleDC, BP_CHECKBOX, CBS_UNCHECKEDNORMAL, rect, NULL);
            rect.OffsetRect(iSize, 0);
            Theme.DrawThemeBackground(CompatibleDC, BP_CHECKBOX, CBS_CHECKEDNORMAL, rect, NULL);
            rect.OffsetRect(iSize, 0);
            Theme.DrawThemeBackground(CompatibleDC, BP_CHECKBOX, CBS_MIXEDNORMAL, rect, NULL);
        }
        else
        {
            rect.OffsetRect(iSize, 0);
            CompatibleDC.DrawFrameControl(rect, DFC_BUTTON, DFCS_BUTTONCHECK | DFCS_FLAT);
            rect.OffsetRect(iSize, 0);
            CompatibleDC.DrawFrameControl(rect, DFC_BUTTON, DFCS_BUTTONCHECK | DFCS_CHECKED | DFCS_FLAT);
            rect.OffsetRect(iSize, 0);
            CompatibleDC.DrawFrameControl(rect, DFC_BUTTON, DFCS_BUTTON3STATE | DFCS_INACTIVE | DFCS_CHECKED | DFCS_FLAT);
        }

        CompatibleDC.SelectBitmap(hOldBitmap);

        ImageList.Add(Bitmap, clrBgnd);

        m_TreeViewCtrl.SetImageList(ImageList.Detach(), TVSIL_STATE);