title: New Data Breakpoint disabled in Visual Studio 2008 mixed project
body: <p>In a DLL invoked from C++/CLI code I don't seem able to set Data Breakpoints in some pure C code. The menu option <em>New Data Breakpoint...</em> is disabled as is the popup in the breakpoints window. I haven't been able to find anyone else reporting this, the only <a href="http://social.msdn.microsoft.com/Forums/fr-FR/vcgeneral/thread/0ce702d6-5428-4b9b-8113-7fa3afe5b66f" rel="noreferrer">similar experience</a> is for a Mobile developer.</p>
  
  <p>Debugging is otherwise working fine - I can set Watches and breakpoints on functions.</p>
  
  <p>I'm using Visual Studio 2008 Professional sp1 on Vista x64.</p>