How can I set and delete cookies for a domain in webbrowser control without using Javascript (which doesn't allow to set / delete cookies without navigating to the website first.)
Managed to accomplish this task by combining these 2:
http://support.microsoft.com/kb/815718
and INTERNET_OPTION_END_BROWSER_SESSION - http://msdn.microsoft.com/en-us/library/windows/desktop/aa385328(v=vs.85).aspx