title: call stack byte offset
body: <p>In the <code>Call Stack</code> window of Visual Studio 2010, what does the byte offset refer to next to the line number?</p>
  
  <pre><code>Test.exe!__tmainCRTStartup()  Line 547 + 0x2c bytes
  </code></pre>
  
  <p>How come some stack frames have a byte offset and others don't?</p>