Usando el MD5 para encriptar datos

Imports System.Security.Cryptography
Imports System.Text
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim md5 As New MD5CryptoServiceProvider
MsgBox(getMd5Hash(texto.Text))
End Sub
Public Function getMd5Hash(ByVal input As String) As String
Dim md5Hasher As New MD5CryptoServiceProvider()
Dim data As Byte() = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input))
Dim sBuilder As New StringBuilder()
Dim i As Integer
For i = 0 To data.Length - 1
sBuilder.Append(data(i).ToString("x2"))
Next i
Return sBuilder.ToString()
End Function
End Class