เรื่องการเรียก password ที่อยู่ในดาต้าเบสเป็น md5 (ตัวเลข+อักษรยาวๆ) มาใช้ใน VB.NET ครับ

Imports System.Data
Imports MySql.Data.MySqlClient
Public Class frmLogin

    Private Sub btnLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogin.Click
        Dim objConn As New MySqlConnection
        Dim objCmd As New MySqlCommand
        Dim dtAdapter As New MySqlDataAdapter

        Dim ds As New DataSet
        Dim dt As DataTable
        Dim strConnString, strSQL As String

        strConnString = "Server=;User Id=; Password=; Database=; Pooling=false"
        strSQL = "SELECT * FROM member WHERE Username = '" & Me.txtUsername.Text & "' AND Password = '" & Me.txtPassword.Text & "' "

        objConn.ConnectionString = strConnString
        With objCmd
            .Connection = objConn
            .CommandText = strSQL
            .CommandType = CommandType.Text
        End With
        dtAdapter.SelectCommand = objCmd

        dtAdapter.Fill(ds)
        dt = ds.Tables(0)

        

        If dt.Rows.Count > 0 Then
            If dt.Rows(0)("Status").ToString.ToLower.Equals("vip") Then

                MsgBox("Wellcome VIP member")
                Form3.Show()
            Else
                MsgBox("Wellcome User Member")
                Form2.Show()
                Me.Hide()

            End If

        Else
            MsgBox("Username or Password Incorrect")

        End If

        dtAdapter = Nothing
        objConn.Close()
        objConn = Nothing


    End Sub

    Private Sub btnClose_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClose.Click
        If MessageBox.Show("Exit application?", "", MessageBoxButtons.YesNo) = DialogResult.Yes Then
            Application.Exit()
        End If
    End Sub
End Class

Imports System.Security.Cryptography
Imports System.Text

Public Function MD5(ByVal strString As String) As String
    Dim ASCIIenc As New ASCIIEncoding
    Dim strReturn As String
    Dim ByteSourceText() As Byte = ASCIIenc.GetBytes(strString)
    Dim Md5Hash As New MD5CryptoServiceProvider
    Dim ByteHash() As Byte = Md5Hash.ComputeHash(ByteSourceText)
    For Each b As Byte In ByteHash
        strReturn = strReturn & b.ToString("x2")
    Next
    Return strReturn
End Function