sorry,can you please write more code for the client side and the server side,because it's so difficult to me to handle it thanks

I wouldn't re-invent the wheel on this one. It's much easier to use a tool that someone else has constructed than to build one on your own. A good forum product out there is DotNetBB. HTH, -BC

:laugh: That's classic! "If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell Not getting the response you want from a question asked in an online forum: How to Ask Questions the Smart Way!

I want to develop entire mail system ex: In school site ,the father of the student can send message to the teqacher of math and ask him about his sun and the teacher of the math can log in and see the messages arrived from the fathers of the students and so on also the manager can see messages arrived from the engineers after log in that what i meant thanks Ahmed Gaser

where can I write this post....? I searched google and fined nothing. If you can help me.... Ahmed Gaser

Not much difference between the two, I am assuming you may not know how to get to the remote server. Use three config keys in your web.config file. Define the regular server name for the local server and use the IP addresses of the remote server. You can also set the servers up as linked servers and then one can talk to the other. I believe you could look into subscription service as well. As for using the same classes you can by compiling a separate dll and importing it into all three apps. Keep the class limited to only returning data or manipulating data and you should be fine. At the application level check to see which application you are using or set a constant that you use when obtaining the data source name. Hope I understood the question and that this helps. I need a break anyway. Pamela Reinskou VersusLaw Inc.

Hmmmm... This sounds suspiciously like a class project.... Some pointers - You'll have to do the grunt work yourself... 1. If you have the ability to use ASP.NET WebServices then you can use them to abstract your business logic what ever that happens to be in the context of this project. 2 & 3: Look for information on replication. Data publishers and data subscribers. 4. That depends on what you mean by "manage"... My own belief is to use stored procedures to manage all access to the database. 5. See 4 6. That is very vague. What are your priorities? --Colin Mackay--