how to get the file size?

i must be getting stupid but..how can i do it? i've searched in IO.File, IO.Pah, IO.Directory and i dont seem to find a way to do it..

This gets file size in bytes .

VB Code:

Dim fil As New IO.FileInfo("c:\aa.txt")
        Dim siz As Long
        siz = fil.Length()
 MessageBox.Show(siz)

tks