How do I change a dropdown box in a webbrowser control?

Question

So I have a listbox I want to change, that looks like this:

How do I c

Answer 1

View the HTML of the website and identify the id and values of the dropdownlist, for example:

    Month
    January
    February
    March

To pre-select the dropdownlist value in the WebBrowser control use this Winform code:

webBrowser1.Document.GetElementById("bdayMonthId").SetAttribute("value", "Feb");