title: What is the significance of ProjectTypeGuids tag in the visual studio project file
body: <p>What is the significance of the ProjectTypeGuids  tag in a visual studio project?? When I created a WPF application, i am seeing two GUIDs in here. </p>
  
  <pre><code>{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}**
  </code></pre>
  
  <p>Does these represent WPF and Windows type of applications?</p>
  
  <p>If I create my own project type (.myproj) that has .xaml and .cs files, what should I fill in this ProjectTypeGuids tags? Should I also need to fill the ProjectType tag?</p>
  
  <p>It would also be better if someone differentiate the ProjectType and ProjectTypeGuids*tags.</p>