If you have a third party translation application that can be commanded to translate the contents of the clipboard, VBLM can be configured to work with it automatically.
The Translation Application Interface Definition Window (whew!), accessed by selecting Translation Apps on the main options menu, is where you do so.
The discussion of HOW to do so is best covered in two topics:
Basic Operation, which explains the general manner in which VBLM works with 3rd party programs, and;
How to Configure, which gets into the practical details with an example.