The ASP processor then calls in a script engine, such as VBScript, to compile and execute the script in each page. By default, the extension for the ASP is .asp. IIS 3.0 and ASP introduced application variables and session variables, which are valuable in constructing Web-based applications. The ASP stores session variables as part of a user's session object and makes these variables available at any point in the Web application, but only for the duration of the user's session. ASP stores application variables as part of the application object and makes these variables available at any point in the Web application.
Several factors can cause application and session variables to be unavailable in an application.
Some of the most common causes for unavailability and their solutions follow. Select the application you wish to change and display its Property pages. Click the Configuration button in the Application Settings section. Enter a new entry for .htm files that matches the .asp entry. Tip Edit the ASP entry, then copy it for the .htm page.