>>These are OK and I use them, but they seem to be limited to the current project or other open projects. (Is that not correct?)
>>I have some clients with 20 projects in 20 different folders, and I want to find references to a string in any one the 20 projects.
>>The code reference tool lets me point at the top level folder and search all files for that string including classes, reports, .prg's etc.
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>I'm stuck with only a VS2008 machine this afternoon but I think VS2010 is similar - In the Find in Files dialog there is a dropdown labeled Look In - there is a button to the right with an ellipsis on it - you can choose a set of search folders to search in.

yup - same in VS2010 - you can choose Entire Solution, All open documents, Current document, Current Project as the scope
But I find the View Call Hierarchy (and, to a lesser extent the Find All References) much more useful.....