It is unclear what PNO_NotifyOwner is, but it appears to be either a constant or a member of an enum. I believe it is a member of an enum. For your code to use this enum, it needs to have a reference to the dll where this enum exists. I found a site on the internet that has the following code:



The site were this comes from seems to be dealing with the code and the book you are working with:
http://www.ik.ku.lt/lessons/konspekt/e-verslas/ASP.htm

Cheers,

Woody Z
http://www.learntoprogramnow.com
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