How do I open up and examine a Moss webpart?

Question

I want to look into one of the out of the box MOSS 2007 webparts and examine the code. After that I want to replicate some of the functionality and add some of my own. Any techniques?

Answer 1

All SharePoint DLL's can be found in the C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\ISAPI folder, use reflector to inspect the code. Some code may be obfuscated though...