Reading voltage of laptop

Hi... Is there any app or software such that we can read or sense the voltage rating of a Laptop or tablets and then send that value to the Arduino through USB and Arduino should sense that exact value take as one of the input?

I know this question may be silly for you but please give any suggestion about this.

http://lmgtfy.com/?q=c%23+reading+laptop+battery+voltage http://lmgtfy.com/?q=vb+reading+laptop+battery+voltage

Sir I want to know the maximum voltage (voltage ratings) not the status of the Battery .

Thank you