Base64 Encode/Decode a String

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

Download Chilkat Crypt ActiveX

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
    Text1.Text = Text1.Text & crypt.LastErrorText & vbCrLf
    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"

'  Indicate that no encryption should be performed,
'  only encoding/decoding.
crypt.CryptAlgorithm = "none"
crypt.EncodingMode = "base64"

'  Other possible EncodingMode settings are:
'  "quoted-printable", "hex", "uu", "base32", and "url"

Dim strBase64 As String
strBase64 = crypt.EncryptStringENC(s)

Text1.Text = Text1.Text & strBase64 & vbCrLf

Dim decoded As String
decoded = crypt.DecryptStringENC(strBase64)

Text1.Text = Text1.Text & decoded & vbCrLf