Scripting Solutions with WSH and COM: Trapping and Handling Errors in Your Scripts

Advanced Error Handling
You can adapt the CheckError subprocedure to extend its usability and capability. For example, to extend CheckError's usability, you can add code that checks the Err::Source value and, based on that value, sets different WScript::Quit error codes, such as 1 for a VBScript runtime error, 2 for a strobj.dll error, and 3 for an unknown error. With this customization, you can learn an error's source at a glance. To learn the type of error at a glance, you can capture the Err::Number value, then replace that number with a text string. With this customization, you don't have to remember or look up the type of error each number represents.

To extend CheckError's capabilities, you can make modifications based on the type of script you're running. If you're running a Windows Installer script or a Microsoft Active Directory Service Interfaces (ADSI) script, you can customize CheckError so that it traps and handles technology-specific types of errors. . . .