(VB.NET) MIME Header Q and B Encoding and Decoding

Demonstrates how to Q and B encode/decode.

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Dim sb As New Chilkat.StringBuilder
Dim success As Boolean

sb.Append("This is a test")

Debug.WriteLine(sb.GetEncoded("B","utf-8"))
'  output is:
'  =?utf-8?B?VGhpcyBpcyBhIHRlc3Q=?=

Debug.WriteLine(sb.GetEncoded("Q","iso-8859-1"))
'  output is:
'  =?utf-8?Q?This_is_a_test?=


Dim sb2 As New Chilkat.StringBuilder

sb2.Append("=?utf-8?B?VGhpcyBpcyBhIHRlc3Q=?=")
sb2.Decode("B","utf-8")
Debug.WriteLine(sb2.GetAsString())

'  output is:
'  This is a test

sb2.Clear()
sb2.Append("=?utf-8?Q?This_is_a_test?=")
sb2.Decode("Q","utf-8")
Debug.WriteLine(sb2.GetAsString())

'  output is:
'  This is a test


'  "B" or "Q" will decode both B and Q.
sb2.Clear()
sb2.Append("=?utf-8?Q?This_is_a_test?= 123 =?utf-8?B?VGhpcyBpcyBhIHRlc3Q=?=")
sb2.Decode("Q","utf-8")
Debug.WriteLine(sb2.GetAsString())

'  output is:
'  This is a test 123 This is a test