Difference between PowerShell, VBScript and WMI

Hi all,

I already know VBScript and uses it for automation. Now, I want to automate some system admin tasks and come to know that can be done using WMI. When I searched on net for WMI resources to learn, then I come to know that it can also be done with the help of PowerShell which is a command prompt but I am still confused by the line that I read on the link below:

http://stackoverflow.com/questions/514492/…dows-powershell

It says: PowerShell is a new command shell and scripting language for Windows.

Is PowerShell a separate language other than WMI?

I got this link also by which I got confused:

Introduction to WMI Basics with PowerShell Part 1

which one should I learn - WMI or PowerShell?

i already searched for this but I did not get the difference between the two (like what WMI was lacking that PowerShell can do)

During beta tests for Avira I've used this tool to check wmi functions:
WMICodeCreator

Yes. But this is not what I asked. I want to know the differences between the two and not how to learn or code it.