Well, the title may be a bit vague I hope this is in the right forum, if not I hope it can be moved to a more suitable location. I am developing a special webpage that is using client communication using special "shortcut" files (my own format). When a user clicks on the special link, a file download is initiated. What I am trying to do is that the Internet Explorer automaticly opens the file, without asking if the user wants to open or save it. The file is using the extension ".shortcut". My client application is bound to that specific extension. When a user clicks "open", the program executes the specific data in the file. I tried a lot, but the registry is a hell to find what you are looking for. I know it is possible, seeing the .asx extension is Auto-opening in my Windows Media Player. I hope my story is clear (enough) to understand it and I hope someone can help me to archieve this. Thanks in advance.