Select Cert for Encrypted Email

Demonstrates how to search for a specific certificate from Current User and Local Machine certificate stores, and then use it for encrypting an email.

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uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATMAILLib2_TLB,
    CHILKATCERTIFICATELib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
mailman: TChilkatMailMan2;
success: Integer;
cert: TChilkatCert;
email: CHILKATMAILLib2_TLB.IChilkatEmail2;

begin
//  The mailman object is used for sending and receiving email.
mailman := TChilkatMailMan2.Create(Self);

//  Any string argument automatically begins the 30-day trial.
success := mailman.UnlockComponent('30-day trial');
if (success <> 1) then
  begin
    ShowMessage('Component unlock failed');
    Exit;
  end;

//  Set the SMTP server.
mailman.SmtpHost := 'smtp.comcast.net';

//  Search the Local Machine and Current User certificate
//  stores for a certificate -- by common name or by email  address.
cert := TChilkatCert.Create(Self);

success := cert.LoadByCommonName('Chilkat Software');
if (success <> 1) then
  begin
    //  Try loading it by email address.
    success := cert.LoadByEmailAddress('comodo@chilkatsoft.com');
    if (success <> 1) then
      begin
        ShowMessage(cert.LastErrorText);
        Exit;
      end;

  end;

//  Create a new email object
email := CoChilkatEmail2.Create();

email.Subject := 'This email is encrypted';
email.Body := 'This is a digitally encrypted mail';
email.From := 'Chilkat Support <support@chilkatsoft.com>';
email.AddTo('Comodo Test','comodo@chilkatsoft.com');

//  Indicate that the email is to be sent encrypted.
email.SendEncrypted := 1;

//  Specify the certificate:
success := email.SetEncryptCert(cert.ControlInterface As CHILKATMAILLib2_TLB.IChilkatCert);
if (success <> 1) then
  begin
    ShowMessage(email.LastErrorText);
    Exit;
  end;

success := mailman.SendEmail(email As CHILKATMAILLib2_TLB.IChilkatEmail2);
if (success <> 1) then
  begin
    ShowMessage(mailman.LastErrorText);
  end
else
  begin
    ShowMessage('Mail Sent!');
  end;
end;