First of all, find all files that contains string 'USE C:\FOXTEMP\'. You can do this by File Search in Windows. Than open each module and search in all methods of that module. Finally, for class libraries it is somewhat tricky. You may try to find classes that contain such string by following way:
SELECT MyLIB.ObjName from (MyClassLibrary.VCX) MyLIB where 'USE C:\FOXTEMP\' $ upper(MyLIB.Methods)
Don't forget after such search to close all tables opened (VCX will be opened as VFP table by such way).

Finally, need to say that better idea is to use command
USE ("C:\FOXTEMP\" + FILE)
Try to avoid '&' usage if possible.

>How can you do Find and Replace code in Visual Fox Pro for the entire application, not just the current form you are editing? I need to change a hard coded drive "USE C:\FOXTEMP\FILENAME.DBF" to a replacable code "USE C:\FOXTEMP\&FILE" throughout the entire application and don't know how to do it.
>
>Thanks!
>Colombo.