title: Intellisense "Toggle Completion Mode" doesn't work with C++ in Visual Studio 2010 Professional
body: <p>I am having problems with my "Toggle Completion Mode" under the Edit->Intellisense tab in Visual Studio 2010 Professional. The picture describes it quite well.</p>
  
  <p><img src="https://i.stack.imgur.com/xWKZ4.png" alt=""></p>
  
  <p>The completion mode works fine in C#.
  Please help.</p>
  
  <p>Thank you in advance!</p>