>How can I search a particular file say "abc.ini", which may be hidden & may also be in hidden folder. The file may be anywhere in the whole c: drive. Only one occurance of the file will be there. I want to do this from program & dont want to use filer.
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>I need the full path of the file.

Marc has sent in the correct direction. If you don't want to use filer.fll then you need to reinvent its functionality in VFP code using ADIR() to get a list of folders and then processing that array to get the list of files and dealing the fact that some folders have both files and other folders and dealing with the recurrsive nature of the search for the file you are looking for. Or you could relax your spec and use Filer.fll and let it do all of that for you.