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ASP does have a way to display errors, watch out though, doing this will display valuable information to potential hackers, it's best to only use this on a test server.

Unexpected errors can stop programs and your application coul be down immadiately. But 'On Error Resume Next' funtcion help you to avoid to stop unexpected errors on code. All you need to put this code after a code block.

It is quite common for people using the CoverYourASP source code to get errors when first connecting to the database. This tutorial explains how simple exception handling helps them fix the problems.

Here you will find an error class called CError that allows you to display a custom dialog box with the option to have a detailed message, a general message, and log the error in a file for later reference. Also uses some JavaScript and DHTML to allow the user to drag the dialog box around.

Everyone has seen an HTTP 404 error at some point. You follow a link on a web page, and BOOM - File not found. Perhaps the author spelt it incorrectly, or the page was uploaded to the server by mistake. This tutorial'll show you how to handle this 404 error gracefully by displaying your custom error page, and send an email to yourself so the problem gets fixed.

The author writes "It is important to know what is going on with your site in development and production. By implementing proper error logging, you can quickly track down errors, and provide your team members with enhanced error information." This tutorial describes how to create a simple and effective logging system using the new ASP Error object.

The basic 404 error or file not found page serves two specific purposes. Firstly, to alert the user that the item they were expecting is not currently available. Secondly, to alert the webmaster that a file is missing or a link is targeting something incorrectly. In order to provide users with a page that will show up whenever a 404 error occurs you need to change the settings on your web server to target a specific page or contact your hosting company to do this for you. Once setup, the location of any file that is requested and not found in the server will be made available as a query string value and can be outputted as a message to the webmaster. Sending a message to the webmaster can be done a number of ways this example demonstrates the use of CDONTS.

This example demonstrates how to serve a custom page to users whenever a 404 error occurs as well as log the user info such as ip, referrer, request, agent into a database.