What I need to send is events. I.e when some action happens in one of comuter, all other must receive notification along with other infomration about the event. A table for messages may do the job but there will be unnecessary database server overload. Also there are other problems like: When event occur, how each station knows that it will not process it more than once, how long the message stays in the table etc.

About the Winsock control: As I understand the recipient and the sender should be known, Is it possible that the sender broadcast the message so that more than one station receive the message?