Delphi ActiveX

Transition from MailMan.FetchByMsgnum to MailMan.FetchOne

Provides instructions for replacing deprecated FetchByMsgnum method calls with FetchOne. Delphi ActiveX

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
mailman: TChilkatMailMan;
msgnum: Integer;
emailObj: IChilkatEmail;
headerOnly: Integer;
numBodyLines: Integer;
emailOut: TChilkatEmail;

begin
success := 0;

mailman := TChilkatMailMan.Create(Self);

// ...
// ...

msgnum := 123;

// ------------------------------------------------------------------------
// The FetchByMsgnum method is deprecated:

emailObj := mailman.FetchByMsgnum(msgnum);
if (mailman.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

// ...
// ...

// ------------------------------------------------------------------------
// Do the equivalent using FetchOne.
// Your application creates a new, empty Email object which is passed 
// in the last argument and filled upon success.

headerOnly := 0;
// Irrelevant because we are not downloading headers-only.
numBodyLines := 0;

emailOut := TChilkatEmail.Create(Self);
success := mailman.FetchOne(headerOnly,numBodyLines,msgnum,emailOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;
end;