title: How to customize toolbar in Team Explorer Source Control Explorer sub-window?
body: <p>I have Team Explorer for Visual Studio 2012 installed, which lets me then access files stored on my employer's TFS server.  I mainly use it to check out files, modify them in a non-VS tool, then upload the changed versions to TFS.  In the Team Explorer window, there's a Source Control Explorer window/tab that has its own toolbar separate from the main Team Explorer window's toolbar:</p>
  
  <p><img src="https://i.stack.imgur.com/YWBQr.png" alt="screenshot showing toolbar in question"></p>
  
  <p>I want to customize this toolbar, to add a button.  But I can't find anything that matches it under TOOLS-> Customize-> Commands-> Toolbar.  Googling gets me unrelated results.</p>