How to run a python script with Python Tools for Visual Studio in a virtualenv?

I don't know how to run the activate.bat in a Python Tools for Visual Studio Project. I have a directory environment in my project with my virtualenv. But, I don't know how I can run ./env/Scripts/activate.bat before the project run my main python script.

I found that if :

• main.py is set as Startup File,
• in the Properties of the project -> Debug tab -> Interpreter Path field, I put the path C:...\env\Scripts\python.exe (i.e. the python executable of the virtualenv)

It works !