Visual Studio has a Create GUID tool (Tools > Create GUID).
What is it for? Can you remember what was the last time you used it?
I just can't imagine why i should copy into the clipboard a new GUID with that tool.
It's a very useful tool for those who develop and maintain COM components. Need to introduce a new registry-exposed class or interface? You need a new GUID. With this tool you click "New GUID", select "Registry format", copy it to the clipborad and then paste into a IDL file.