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.

{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}**

Does these represent WPF and Windows type of applications?

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?

It would also be better if someone differentiate the ProjectType and ProjectTypeGuids*tags.

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