Modules & VBA :: Find All Files / Folders In A Specific Directory

I'm using a function to find all files/folders in a specific directory, then copy each one to a specific destination folder. I'm going to use this on a weekly basis to backup files on a computer. I would like to use the vbarchive in GetAttr/SetAttr so I only need to copy these if they have changed since last backup.

Something like:

If GetAttr(strFile) And vbArchive = 32 then
filecopy xxxx, xxxx
else
rs.movenext

As I understand it, a value of 32 indicates that the file has been modified since it was last backuped up (i.e. since the file attribute was "reset"). How do I "reset" the file attributes to clear the vbArchive?? I've read some google searches and the only thing I could find was the files were set to vbnormal however I'm concerned that this will erase program files that are vbReadOnly or VbHidden.