Make Subsequent Calls
Once you have determined the user’s level of service, you can make
additional calls to Yahoo! Mail. For example, call the
ListFolders method to get a list of folders that the user
has in their mail account.
Some methods require parameters passed as a single object
parameter. For example, the following code creates and passes to the
ListMessages method a Request object containing which
folder to fetch messages from, where to start, and the number of
messages to fetch.