The SrcTool Utility
The SrcTool (Srctool.exe) utility lists all files indexed within the .pdb file. For each file, it lists the full path, source control server, and version number of the file. You can use this information for reference.
You can also use SrcTool to list the raw source file information from the .pdb file. To do this, use the -s switch on the command line.
SrcTool has other options as well. Use the ? switch to see them. Of most interest is that this utility can be used to extract all of the source files from version control. This is done with the -x switch.