VBScript is a language and execution environment which can be used to manage a Windows NT system.
A Script can be created in a text editor, such as NotePad, and saved in a file with an extension of .vbs.
If the Microsoft Scripting Host is installed, then double clicking on the file results in the script being executed by WScript.exe.
The documentation for the Script Host and VBScript is available by searching the Microsoft MSDN for VBScript.