Add an Online Update feature for your software
http://lanssoft.com/updatenow.htm

Update Now! Control makes an easy way to add an Online Update feature for your software. It was designed to be as programmer-friendly as possible, by providing features such as no user input to run in the background and event-driven notifications.

Feature highlights:

Download now! is completely API compilation, you won't need additional attachment Microsoft WinSock Control;
Supporting proxy server and its checking function;
Supporting Resume broken downloads;
Perfect status events, Is so convenient for you to write out more friendly interface;
Supplying beautiful download progress bar;
Download now! it is Asynchronous operation, namely you don't need to wait for the completion of the download threads, you can deal with other tasks at the same time, The control will process the download job at the