Send Ping to Yahoo! when RSS Feed is Updated

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How to ping Yahoo! when an RSS feed has been updated, using the REST interface.

Chilkat.Http http = new Chilkat.Http();

bool success;

//  Any string unlocks the component for the 1st 30-days.
success = http.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    MessageBox.Show(http.LastErrorText);
    return;
}

//  Yahoo indicates that The REST interface:
//  URL: http://ping.feeds.yahoo.com/rss/ping
//  Parameter(s): u=<site or feed url>
//  HTTP method: GET

//  The RSS2 feed URL for blog.chilkatsoft.com is:
//  http://blog.chilkatsoft.com/?feed=rss2

//  Send the HTTP GET and return the content in a string.
string responseText;
responseText = http.QuickGetStr("http://ping.feeds.yahoo.com/rss/ping?u=http://blog.chilkatsoft.com/?feed=rss2");

textBox1.Text += responseText + "\r\n";