Regular expressions are extremely powerful method of manipulating and reporting on unstructured text such as log files.  VBScript does a respectable job of implementing them...

but they can be very challenging to debug.  Especially since syntax errors can be introduced into your code if you don't properly build the expression.  This regular expression tester is an application which lets you enter some sample text and a regular expression and then it graphically highlights what part of the text your expression would isolate.  Can save you mean head-bloggening hours!

The program requires .NET 1.1 and it has a tutorial built into the help menu.

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Topic: "Scripting"