How to use dir and copy together to search directories and copy to a folder?

You could just use xcopy:

xcopy /s foo???.txt g:\someplace

This will hold the directory structure.

If you don't want the directory structure you can do the following:

for /r %i in (foo???.txt) do xcopy /Y "%i" g:\someplace

If you are using this in a batchfile you should double the % like this:

for /r %%i in (foo???.txt) do xcopy /Y "%%i" g:\someplace

with Powershell u can run this:

cmd.exe /c dir *.txt /s /b | copy -Destination d:\md

part cmd.exe part Powershell bit more understandable but there overlapping