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[snoo]

I'm newly joined developer and have no keen knowledge on it. After fighting with the problem I thought to ask for some help.

I'm developing a web site using asp.net(c#). sql 2000 sever.
there are two major parties. Patient and donor. donors divided into two parties active and inactive.

client requirement is soon after active donor registered with the system system has to popup a message to all users who are currently logged in.(like popup we see in the gmail chat)It should not be the same. but somehow I need to popup a message when active donor registers.
there are lot of users.no matter which page each user has logged they have to receive the popup message containing donor ID and his blood group.

I tried to do it using net send. but client clearly specify that it should generated automatically with out user involvement.

system will be deployed at several places around the island.

I highly appreciate if any body can help.
Thank you.