Windows XP search for files which have specfic name length

Question

I want to look for all .txt files in a folder, which their filename starts with r and is 4 character length or lower (<=4)

What's the query? (in Windows XP)

Answer 1

r???.txt will work. The question marks represent each character so it will match all txt files starting with r with up to 4 characters.

OR

PowerShell
get-childitem c:\ -r r*.txt |? {$.GetType().Name -match "File" } |? {$.basename.length -le 5} | %{$_.name}