Typically when you are testing, you are testing against a build. Because of this, Microsoft Test Manager (MTM) (part of Visual Studio Test Professional 2010) integrates with TFS Build and lets you work with build.
To use the build integration with MTM, the first step is to pick a build. To do this,
On clicking the Modify hyperlink above, you come to Assign Build page. You can come to this page alternatively by Track->Assign Build too. Here the Modify link will take you back to the screen 1. The View build details hyperlink with show the TFS Build details for this build. To choose a new build -