Webservice callback

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Hi NG,
I want to use a Webservice to pass data from a client to the WebServer. The
client then immediately gets the response "Data send - wait for the result".
After a while (after the data has been processed) the Webserver has to pass
the calculated data to client.

One way could be to let the client request "Data Ready?" every x
milliseconds.
Another way could be to call the WebService asynchronously (or by with a
callback-delegate) - if this can be done.
Or maybe ther is a better way to do it?!

Thanx in advance
Chuck


.

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