Problem with dialogs and windows themes

[Mathefreak]

In my dialog based app I changed the properties of the main dialog from tool window to non tool window (purpose was to show system menu). Now some users using windows themes have problems with this new version: main menu is partially missing, static and edit controls are looking quite strange Example with theme: http://img275.echo.cx/img275/3749/p732122541078284is.jpg[^] and w/o theme: http://img104.echo.cx/img104/8655/p732122544251872pq.jpg[^] Are there any suggestions for solving this? :confused: TIA Mathefreak