(Delphi DLL) MIME Header Q and B Encoding and Decoding

Demonstrates how to Q and B encode/decode.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, StringBuilder;

...

procedure TForm1.Button1Click(Sender: TObject);
var
sb: HCkStringBuilder;
success: Boolean;
sb2: HCkStringBuilder;

begin
sb := CkStringBuilder_Create();

CkStringBuilder_Append(sb,'This is a test');

Memo1.Lines.Add(CkStringBuilder__getEncoded(sb,'B','utf-8'));
//  output is:
//  =?utf-8?B?VGhpcyBpcyBhIHRlc3Q=?=

Memo1.Lines.Add(CkStringBuilder__getEncoded(sb,'Q','iso-8859-1'));
//  output is:
//  =?utf-8?Q?This_is_a_test?=

sb2 := CkStringBuilder_Create();

CkStringBuilder_Append(sb2,'=?utf-8?B?VGhpcyBpcyBhIHRlc3Q=?=');
CkStringBuilder_Decode(sb2,'B','utf-8');
Memo1.Lines.Add(CkStringBuilder__getAsString(sb2));

//  output is:
//  This is a test

CkStringBuilder_Clear(sb2);
CkStringBuilder_Append(sb2,'=?utf-8?Q?This_is_a_test?=');
CkStringBuilder_Decode(sb2,'Q','utf-8');
Memo1.Lines.Add(CkStringBuilder__getAsString(sb2));

//  output is:
//  This is a test

//  "B" or "Q" will decode both B and Q.
CkStringBuilder_Clear(sb2);
CkStringBuilder_Append(sb2,'=?utf-8?Q?This_is_a_test?= 123 =?utf-8?B?VGhpcyBpcyBhIHRlc3Q=?=');
CkStringBuilder_Decode(sb2,'Q','utf-8');
Memo1.Lines.Add(CkStringBuilder__getAsString(sb2));

//  output is:
//  This is a test 123 This is a test

CkStringBuilder_Dispose(sb);
CkStringBuilder_Dispose(sb2);

end;