(Delphi ActiveX) Transition from Imap.ThreadCmd to Imap.QueryThread

Provides instructions for replacing deprecated ThreadCmd method calls with QueryThread.

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

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

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
imap: TChilkatImap;
threadAlg: WideString;
charset: WideString;
searchCriteria: WideString;
bUid: Integer;
jsonObj: IChilkatJsonObject;
json: TChilkatJsonObject;
success: Integer;

begin
imap := TChilkatImap.Create(Self);

// ...
// ...

threadAlg := 'REFERENCES';
charset := 'UTF-8';
searchCriteria := 'SUBJECT a';
bUid := 1;

// ------------------------------------------------------------------------
// The ThreadCmd method is deprecated:

jsonObj := imap.ThreadCmd(threadAlg,charset,searchCriteria,bUid);
if (imap.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// ...
// ...

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

imap.SearchCharset := 'UTF-8';

json := TChilkatJsonObject.Create(Self);
success := imap.QueryThread(threadAlg,searchCriteria,bUid,json.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;
end;