' Returns the size of the specified directory' - Note: requires Imports System.IO' - Usage: Dim DirSize As Long = GetDirectorySize("D:Projects")Function GetDirectorySize(ByVal DirPath As String) As Long  Dim DirSize As Long  Dim Dir As DirectoryInfo = New DirectoryInfo(DirPath)  ' add the size of each file  Dim ChildFile As FileInfo  For Each ChildFile In Dir.GetFiles()    DirSize += ChildFile.Length  Next  ' add the size of each sub-directory, that is retrieved by recursively  ' calling this same routine  Dim SubDir As DirectoryInfo  For Each SubDir In Dir.GetDirectories()    DirSize += GetDirectorySize(SubDir.FullName)  Next  Return DirSizeEnd Function