string fn = Server.MapPath("~/path to the file..");Response.ClearHeaders();Response.ContentType = "application/x-force-download";Response.AddHeader("Content-Disposition", "attachment; FILENAME = \"txCaptcha.zip\"");Response.TransmitFile(fn);Response.End();

Here is a free online php book which teaches php in great detail.http://www.hudzilla.org/php/

With more than 20 chapters, this online book contains virtually everything you will need to know to be able to develop websites in the PHP.Once you think you have mastered the language, you can take the online exam and test your art of php programming!

This is a must read if you are interested in learning php.

Setting up pretty looking permalinks with wordpress and Apache is very easy. Apache's mod_rewrite functionality makes it a matter of seconds. However, when you are hosting your wordpress blog on IIS, lack of native URL rewriting capability on IIS makes it impossible to have the pretty URLs like seen on Wordpress with Apache.

There is an option though, (almost pretty looking permalinks).The URLs of the posts will be like /index.php/post-title/ instead of /post-title/That is as near you can get to the pretty URLs on IIS by only configuring wordpress.

Wordpress 2.5.1

On wordpress 2.5.1, use the following steps to set up "almost pretty URLs".

1. Choose settings from your admin CP
2. Click on the Permalink link
3. Check "custom structure" radio button
4. In the box provided for entering the custom link structure, type "/index.php/%postname%/" without the quotes.
5. Hit the save changes button!

You are done. Now there will not be any '?' in the permalinks of your posts. For more information about the permalinks with wordpress, visithttp://codex.wordpress.org/Using_Permalinks

There exists some other methods using which you can have pretty permalinks on IIS like using custom 404 redirect support etc. But I have not tryed them yet.

Sometimes, you may want to launch your application when user clicks a link on your webpage. This is especially useful for gaming sites, starting the gamewhen the player joins a poker table etc. You can see this at work at http://allinplay.com.

Few months ago, I was into a project where I had to implement this feature. Since it was to work only in windows, I could use custom "url protocol" handlersupport.

For that I registered the application to be started as an url protocol with a custom url scheme for example "appname.webstart". Then launching the appwas just a matter of navigating to a url which uses the registered scheme for example "appname.webstart:arguments".

How it works: When your browser (both IE and firefox) is navigating to a url, it looks up the scheme in the registry and loads the attached handler. schemeslike http and ftp have default handlers implemented.What we do is create a new scheme and specify our application as the handler, after which all the requests for that scheme will be handled by our application.

How to launch: You can use javascript to redirect the browser the url likelocation.href = "appname.webstart:2998";Here "2998" is some type of argument for the app. Now the browser will start the app with the specifyed argument. The program should parse the commandlineargument and perform the action according to it.

Detail instructions about creating url protocol handlers and how to register them can be found at http://msdn2.microsoft.com/en-us/library/aa767914(VS.85).aspx.