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Asynchronous processing

I have a question. I have an Excel app that send an XML request to a
server, receives and displays results. The problem is that it takes a
long time for server to process and Excel is frozen during this time.
So I need to write a middle-tier ActiveX in .NET that would get a
request from Excel, send it to server asynchronously, recieve
results, somehow notifies Excel and passes the results. I have never
dealt with asynchrounous processing and would appreciate any help or
pointing in a right direction.
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Nov 20 '05 #1
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