List files of certain pattern using Excel VBA

Question

How to list all the files which match a certain pattern inside a user specified directory? This should work recursively inside the sub folders of the selected directory. I also need a convenient way(like tree control) of listing them.

Answer 1

It appears that a couple answers talk about recursion, and one about regex. Here's some code that puts the two topics together. I grabbed the code from http://vba-tutorial.com

Sub FindPatternMatchedFiles()

    Dim objFSO As Object
    Set objFSO = CreateObject("Scripting.FileSystemObject")

    Dim objRegExp As Object
    Set objRegExp = CreateObject("VBScript.RegExp")
    objRegExp.pattern = ".*xlsx"
    objRegExp.IgnoreCase = True

    Dim colFiles As Collection
    Set colFiles = New Collection

    RecursiveFileSearch "C:\Path\To\Your\Directory", objRegExp, colFiles, objFSO

    For Each f In colFiles
        Debug.Print (f)
        'Insert code here to do something with the matched files
    Next

    'Garbage Collection
    Set objFSO = Nothing
    Set objRegExp = Nothing

End Sub

Sub RecursiveFileSearch(ByVal targetFolder As String, ByRef objRegExp As Object, _
                ByRef matchedFiles As Collection, ByRef objFSO As Object)

    Dim objFolder As Object
    Dim objFile As Object
    Dim objSubFolders As Object

    'Get the folder object associated with the target directory
    Set objFolder = objFSO.GetFolder(targetFolder)

    'Loop through the files current folder
    For Each objFile In objFolder.files
        If objRegExp.test(objFile) Then
            matchedFiles.Add (objFile)
        End If
    Next

    'Loop through the each of the sub folders recursively
    Set objSubFolders = objFolder.Subfolders
    For Each objSubfolder In objSubFolders
        RecursiveFileSearch objSubfolder, objRegExp, matchedFiles, objFSO
    Next

    'Garbage Collection
    Set objFolder = Nothing
    Set objFile = Nothing
    Set objSubFolders = Nothing

End Sub