VBScript (“Visual Basic Scripting Edition”) is an Active Scripting language developed by Microsoft that is modeled on Visual Basic. It is designed as a “lightweight” language with a fast interpreter for use in a wide variety of Microsoft environments. VBScript uses the Component Object Model to access elements of the environment within which it is running; for example, the File System Object (FSO) is used to create, read, update and delete files.
We have covered basic and essential topics like introduction to VB Script, Inline, INT Extension, variable, arrays, constant, operator, conditional, conditional expression, looping, Loop expressions, procedure, procedure expression, built in and keywords.
So these are the concepts we have covered, these are enough as VB Script is not widely used today. Although you want to learn more than you can go to http://www.w3schools.com/asp/vbscript_default.asp where you can gain more idea about VB Script.