I need help! What I'm trying to do is very similar to the Message Pane in the Apple Mail application, ie. put a WebView together with one other view into a NSScrollView. In the case of Apple Mail, the WebView displays HTML messages, the other view displays the message headers, and a single set of scrollbars make them scroll both at the same time. To do so, I have a TilingView that contains a NSBoxView and a WebView. The WebView doesn't have scrollbars: instead, it adjusts its size to the size of the HTML document. The TilingView listens to NSViewFrameDidChangeNotification, adjusts its size to the size of the WebView, makes additional space for the NSBoxView, and is included into a NSScrollView. All that works fine as long as I'm using the scrollbars of my NSScrollView: the NSBoxView and the WebView scroll together and allow to see the entire document, and the scrollbars are shown/hidden correctly if the NSScrollView is large enough to display both views simultaneously. The problem is: auto-scroll does not work. When I click into the WebView, the mouseDown event is captured and handled by the WebView, and is not propagated up the view hierarchy into my NSScrollView. What can I do to make the TilingView auto-scroll inside the NSScrollView? --- Here are more details to put you on track maybe... The view hierarchy of my application, as displayed by F-Script, is: WebHTMLView WebClipView WebDynamicScrollBarsView WebFrameView WebView MyTilingView NSClipView NSScrollView MyComposedView etc... The view hierarchy of Apple Mail (when displaying an HTML mail) is: MessageWebHTMLView WebClipView WebDynamicScrollBarsView WebFrameView MessageWebView TilingView NSClipView NSScrollView ColorBackgroundView etc... How does Apple Mail manage to have the WebView create and use their own subclass of WebHTMLView (the "MessageWebHTMLView") instead of a standard WebHTMLView? Thanks a lot, Piet ____________________________________________________________________________________ Park yourself in front of a world of choices in alternative vehicles. Visit the Yahoo! Auto Green Center. http://autos.yahoo.com/green_center/