Ho fatto questo:
ListView1.Items.Clear()
Dim li As ListViewItem
ListView1.LargeImageList = imageListLarge
Dim myDir As DirectoryInfo = New DirectoryInfo(Path)
Dim aFile As FileInfo
Dim i As Integer = 0
For Each aFile In myDir.GetFiles
li = ListView1.Items.Add(aFile.Name)
li.ImageIndex = i
imageListLarge.Images.Add(Bitmap.FromFile(aFile.FullName))
i = i + 1
Next
ina ImageList popolata dal "For Each" e una ListView con Icone Grandi ho modificato la misura portandola a 150px X 150px e via ......