This article lists the aliasses you can use in visual studio when searching with a regular expression.

http://msdn.microsoft.com/en-us/library/2k3te2cs(VS.80,ide).aspx

For example  if you want to find all guids in your solution

• CTRL-SHFT-F (find in files)
• Entire Solution
• check the Use Regular Expressions box
• type in the find box :h^8-:h^4-:h^4-:h^4-:h^12
• go