How to open Console on VS2012?

I want to use printf some messages on VS2012;
Now I use debug to see messages,it’s so slow…

Why not use juce::Logger?

If you really really really want to see a separate console window, and since you’re on Windows, look into AllocConsole. Mind you, there’s a handful of other stuff you need to do to get it working right.

I used "Logger::outputDebugString(“message”);"
but I could’t found where is the “message” showed
I’m a beginner

In the “Output” window. It’s the same place where you see the compiling messages, etc.