Try something like

Code:
Private Sub Text1_LostFocus()
     Dim usrnm As String
     usrnm = TextBox1.Text
     adoRS.Close
     adoRS.Open "SELECT * FROM pass WHERE password='" & usrnm & "';", adoConn, adOpenStatic, adLockOptimistic
     If adoRS.Fields("Password").Value = TextBox1.Text And adoRS.Fields("username").Value = "Pengurus" Then
        pass = True
        'if password valid, success
        Unload Me
        frmMain.Show
     Else
        'If password invalid
        intCounter = intCounter + 1
        If intCounter = 4 Then
            MsgBox "You have insert invalid password more then 3", vbCritical, "Warning"
            intCounter = 0
            Unload Me
            Application.Shutdown
        Else
            MsgBox "Please input valid password", vbCritical, "Warning"
            TextBox1.SetFocus
            TextBox1.Text = ""
        End If
    End If
End Sub