VB6 Code - Encrypt Decrypt String Yang Disertai Password

Contoh fungsi encrypt- decrypt string yang disertai dengan password menggunakan VB6.

'Fungsi untuk meng-encrypt string
Public Function EncryptText(strText As String, ByVal strPwd As String)
    Dim i As Integer, c As Integer
    Dim strBuff As String
    If Len(strPwd) Then
        For i = 1 To Len(strText)
            c = Asc(Mid$(strText, i, 1))
            c = c + Asc(Mid$(strPwd, (i Mod Len(strPwd)) + 1, 1))
            strBuff = strBuff & Chr$(c And &HFF)
        Next i
    Else
        strBuff = strText
    End If
    EncryptText = strBuff
End Function

'Fungsi untuk men-decrypt string 
Public Function DecryptText(strText As String, ByVal strPwd As String)
    Dim i As Integer, c As Integer
    Dim strBuff As String
    If Len(strPwd) Then
        For i = 1 To Len(strText)
            c = Asc(Mid$(strText, i, 1))
            c = c - Asc(Mid$(strPwd, (i Mod Len(strPwd)) + 1, 1))
            strBuff = strBuff & Chr$(c And &HFF)
        Next i
    Else
        strBuff = strText
    End If
    DecryptText = strBuff
End Function