Delphi ActiveX

Transition from MailMan.FetchSingleHeaderByUidl to MailMan.FetchByUidl

Provides instructions for replacing deprecated FetchSingleHeaderByUidl method calls with FetchByUidl. 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;
uidl: WideString;
emailObj: IChilkatEmail;
headerOnly: Integer;
emailOut: TChilkatEmail;

begin
success := 0;

mailman := TChilkatMailMan.Create(Self);

// ...
// ...

numBodyLines := 5;
uidl := '123';

// ------------------------------------------------------------------------
// The FetchSingleHeaderByUidl method is deprecated:

emailObj := mailman.FetchSingleHeaderByUidl(numBodyLines,uidl);
if (mailman.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

// ...
// ...

// ------------------------------------------------------------------------
// Do the equivalent using FetchByUidl.
// 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.FetchByUidl(uidl,headerOnly,numBodyLines,emailOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;
end;