Delphi ActiveX

Transition from MailMan.GetHeaders to MailMan.FetchRange

Provides instructions for replacing deprecated GetHeaders method calls with FetchRange. 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;
fromIndex: Integer;
toIndex: Integer;
bundleObj: IChilkatEmailBundle;
keepOnServer: Integer;
headersOnly: Integer;
bundleOut: TChilkatEmailBundle;

begin
success := 0;

mailman := TChilkatMailMan.Create(Self);

// ...
// ...

numBodyLines := 3;
fromIndex := 0;
toIndex := 9;

// ------------------------------------------------------------------------
// The GetHeaders method is deprecated:

bundleObj := mailman.GetHeaders(numBodyLines,fromIndex,toIndex);
if (mailman.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

// ...
// ...

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

keepOnServer := 1;
headersOnly := 1;

bundleOut := TChilkatEmailBundle.Create(Self);
success := mailman.FetchRange(keepOnServer,headersOnly,numBodyLines,fromIndex,toIndex,bundleOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;
end;