[BioC] Applying bioconductor functions to files in different Windows directories

[Ruppert Valentino]

Hello,
            I would be grateful for any help or advise on the following issue.
 
I have affy files in different directories and want to point ReadAffy() to read files from all directories. 
Is there a way I can do this via setwd but in a loop and if so how?
 
For example can I say :

setwd("C:\\RawArrayData\\Cel Files\\U133\\*")
X <- ReadAffy()
 
 
Also similarly, I wrote a function that annotate files in separate directories. Can I run that on the root and get it to annotate all files below 
the root directory in windows i.e. the children of the root directory.
 
 
Many Thanks,
 
 
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