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.

Dim http As New Chilkat.Http()

Dim success As Boolean

'  Any string unlocks the component for the 1st 30-days.
success = http.UnlockComponent("Anything for 30-day trial")
If (success <> true) Then
    MsgBox(http.LastErrorText)
    Exit Sub
End If


'  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.
Dim responseText As String
responseText = http.QuickGetStr("http://ping.feeds.yahoo.com/rss/ping?u=http://blog.chilkatsoft.com/?feed=rss2")

TextBox1.Text = TextBox1.Text & responseText & vbCrLf