Base64 Encode/Decode a String

Download Chilkat Crypt ActiveX

Visual Basic example to base-64 encode and decode a string.

Dim crypt As New ChilkatCrypt2

'  Any string argument automatically begins the 30-day trial.
Dim success As Long
success = crypt.UnlockComponent("30-day trial")
If (success <> 1) Then
    MsgBox "Crypt component unlock failed"
    Exit Sub
End If

Dim s As String
s = "A friend called me up the other day and talked about investing in a dot-com that sells lobsters. Internet lobsters. Where will this end? --Donald Trump"

crypt.CryptAlgorithm = "none"
crypt.EncodingMode = "base64"

'  Other possible EncodingMode settings are:
'  "quoted-printable", "hex", and "url"

Dim qp As String
qp = crypt.EncryptStringENC(s)

Text1.Text = Text1.Text & qp & vbCrLf
Text1.Refresh

Dim decoded As String
decoded = crypt.DecryptStringENC(qp)

Text1.Text = Text1.Text & decoded & vbCrLf
Text1.Refresh