ros::init(…) throws an error - Windows roscpp

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I'm trying to use ros in cpp with Visual Studio 2012. I wrote the publisher and subscriber tutorial (http:// wiki.ros.org/ROS/Tutorials/WritingPublisherSubscriber%28c%2B%2B%29) and first, I configure the project as says in the guide (http:// wiki.ros.org/win_ros/hydro/Msvc%20SDK%20Projects).

Then i compiled an linked the publisher, but when I tried to run it, ros::init(argc,argv,"talker") throws an exception... The console says that I ROS_MASTER_URI is not defined but I've got it defined

There are 2 images here: https:// www.dropbox.com/s/o12m0l38gaxiugi/err... - https:// www.dropbox.com/s/ocdmf0wj6rj0962/err...

Can anyone helps me?

Thanks in advance