C# .NET - is it possible connect web and window application

dear all,

          Is it possible to connect stand alone application with web application.....if yes please help me out from my problem....

Not without an ActiveX control and security permissions lowered.  You could create an intermediary service/web service that your web app could send data to and then your desktop app could query/listen to the service for events.

You can't "push" data to the web app via the standard port 80 http protocol though.

You can use the WebBrowser control if you want a visual representation of the web site, or you can use the WebClient class to send and receive data to a page or webservice.