Delphi ActiveX

Transition from Imap.FetchChunk to Imap.FetchRange

Provides instructions for replacing deprecated FetchChunk 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;
imap: TChilkatImap;
startSeqNum: Integer;
count: Integer;
failedSet: TMessageSet;
fetchedSet: TMessageSet;
bundleObj: IChilkatEmailBundle;
headersOnly: Integer;
bundleOut: TChilkatEmailBundle;

begin
success := 0;

imap := TChilkatImap.Create(Self);

// ...
// ...

startSeqNum := 1;
count := 5;

failedSet := TMessageSet.Create(Self);
fetchedSet := TMessageSet.Create(Self);

// ------------------------------------------------------------------------
// The FetchChunk method is deprecated:

bundleObj := imap.FetchChunk(startSeqNum,count,failedSet.ControlInterface,fetchedSet.ControlInterface);
if (imap.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(imap.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.

headersOnly := 0;

bundleOut := TChilkatEmailBundle.Create(Self);
success := imap.FetchRange(headersOnly,startSeqNum,count,bundleOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;
end;