Vagrant syntax for adding existing local box

Syntax provided below can be used on windows to add existing local vagrant boxes.

$ vagrant box add custom32 file:///f://Vagrant//precise32.box  

In the above command custom32 is the name for the vagrant box and file:///f://Vagrant//precise32.box is the locally available box. This box was downloaded from internet and placed locally on f drives Vagrant folder.

Also see the screenshot below: