(Delphi DLL) Transition from MailMan.GetHeaders to MailMan.FetchRange

Provides instructions for replacing deprecated GetHeaders method calls with FetchRange.

Note: This example requires Chilkat v11.0.0 or greater.

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, MailMan, EmailBundle;

...

procedure TForm1.Button1Click(Sender: TObject);
var
mailman: HCkMailMan;
numBodyLines: Integer;
fromIndex: Integer;
toIndex: Integer;
bundleObj: HCkEmailBundle;
keepOnServer: Boolean;
headersOnly: Boolean;
bundleOut: HCkEmailBundle;
success: Boolean;

begin
mailman := CkMailMan_Create();

// ...
// ...

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

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

bundleObj := CkMailMan_GetHeaders(mailman,numBodyLines,fromIndex,toIndex);
if (CkMailMan_getLastMethodSuccess(mailman) = False) then
  begin
    Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
    Exit;
  end;

// ...
// ...

CkEmailBundle_Dispose(bundleObj);

// ------------------------------------------------------------------------
// 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 := True;
headersOnly := True;

bundleOut := CkEmailBundle_Create();
success := CkMailMan_FetchRange(mailman,keepOnServer,headersOnly,numBodyLines,fromIndex,toIndex,bundleOut);
if (success = False) then
  begin
    Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
    Exit;
  end;

CkMailMan_Dispose(mailman);
CkEmailBundle_Dispose(bundleOut);

end;