Please see this link for the rest of this saga. http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=391357&SiteID=1

Here's the code that properly selects an element from the listbox: HtmlElement eltCountryList = webBrowser1.Document.GetElementById("countryList"); HtmlElementCollection eltOptions = eltCountryList.GetElementsByTagName("option"); foreach (HtmlElement op in eltOptions) { op.SetAttribute("selected", ""); // de-select all items in the list } eltOptions[25].SetAttribute("selected", "True"); // set "United States" as the selected item

> What does that have to do with setting designMode to ON? It was a shot in the dark. I thought maybe the HTMLDocument was in some kind of read-only state because I have NEVER found a way to modify a page in the web browser. Some kind of exception is always thrown. One said something about an access violation.

My guess is that the managed web browser is failing because the underlying unmanaged browser is failing. You can try though; you can mix the managed layer with the underlying native interfaces. You can do this by casting the webBrowser.Document.DomDocument object to IHtmlDocument2 and going from there. Tech, life, family, faith: Give me a visit. I'm currently blogging about: Is Jesus the Jewish Messiah? The apostle Paul, modernly speaking: Epistles of Paul Judah Himango

Ok, fair enough, I am automating navigation through a set of web pages by putting the NET 2.0 Webbrowser control on a dialog. When I get to the third page in the sequence I need to change the default item in a listbox on the web page to the item that I know in advance I want selected. I've been successful in using InvokeMember("Click") to click a button on a web page but I have not been able to "click" on an item in a list in order to select it.