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 change the July value? I need this to be 100% automated and change it to January. I made a lot of accounts on various websites and need to change them all back to the same birthdate. Yes, I'm aware I'll have to find the ID of it, etc.

Answer 1

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

<select id="bdayMonthId" size="1" name="bdayMonth">
    <option value="">Month</>
    <option value="Jan">January</>
    <option value="Feb">February</>
    <option value="Mar">March</>
</select>

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

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