A little code snippet that lists files in a directory.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
Handles Button1.Click
' make a reference to a directory
Dim di As New IO.DirectoryInfo("c:\")
Dim diar1 As IO.FileInfo() = di.GetFiles()
Dim dra As IO.FileInfo
'list the names of all files in the specified
directory
For Each dra In diar1
ListBox1.Items.Add(dra)
Next
End Sub
To filter search change di.GetFiles() to di.GetFiles(“.extionsion”)