Delphi ActiveX

Transition from MailMan.FetchSingleHeader to MailMan.FetchOne

Provides instructions for replacing deprecated FetchSingleHeader 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;
numBodyLines: Integer;
msgnum: Integer;
emailObj: IChilkatEmail;
headerOnly: Integer;
emailOut: TChilkatEmail;

begin
success := 0;

mailman := TChilkatMailMan.Create(Self);

// ...
// ...

numBodyLines := 5;
msgnum := 1;

// ------------------------------------------------------------------------
// The FetchSingleHeader method is deprecated:

emailObj := mailman.FetchSingleHeader(numBodyLines,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 := 1;

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;