[Bug 47666] New: AviUtl: the corresponding value is reset after clicking up-down control.

https://bugs.winehq.org/show_bug.cgi?id=47666

Bug ID: 47666
           Summary: AviUtl: the corresponding value is reset after
                    clicking up-down control.
           Product: Wine
           Version: 4.0.1
          Hardware: x86
               URL: http://spring-fragrance.mints.ne.jp/aviutl/aviutl_plus
                    _20120619.zip
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: comctl32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: Ubuntu

AviUtl is a Japanese AVI file editing tool. When a user clicks up-down control
in the dialog, the corresponding value is updated but immediately reset after
the click.

Steps to reproduce:
1. Download aviutl_plus_20120619.zip from
http://spring-fragrance.mints.ne.jp/aviutl/
2. Unzip it.
3. Launch aviutil.exe in Japanese locale, i.e. LANG=ja_JP.UTF-8 wine aviutl.exe
4. Choose [設定]-[拡張編集の設定] (Settings-ExEdit Settings), then the window titled
拡張設定 (ExEdit) will be shown.
5. Right click the time-line part on the window and choose [新規プロジェクトの作成]
(Create new project). A new dialog window will appear.
6. Click [OK].
7. After the click, right click the time-line part again and choose
[メディアオブジェクトの追加]-[グループ制御] (Add Media Object-Group Control). グループ制御 (Group
Control) dialog will be shown.
8. In the dialog, click up-down control's down button nearby the lower right
corner.

Expected behavior:
* The left side edit control (indicates 対象レイヤー数 (number of target layers))
shows '1' instead of '--', and keeps the value.

Actual behavior:
* The left side edit control shows '1' while clicking. But, it shows '--' again
right after releasing the mouse button.