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how to retain old value

angelin prema
Greenhorn

Joined: Jun 11, 2007
Posts: 25
when I give duplicate port numbers, it displays, "port Number is duplicated".
When i click Ok,I should retain the old value.
How to retain it?
My code is
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: how to retain old value
 
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