procedure TForm2.btnExtractClick(Sender: TObject);
begin
  memLog.Clear();
  memResult.Clear();

  DBStructure1.Objs.MSSQLServerOptions.Assign(DBComparer1.MSSQLServerOptions);
  DBStructure2.Objs.MSSQLServerOptions.Assign(DBComparer1.MSSQLServerOptions);

  DBCConnectionADO1.Connected := True;
  DBCConnectionADO2.Connected := True;
  try
    DBStructure1.Clear();
    memLog.Lines.Add('Open ' + edtMasterDatabaseName.Text + ' DataBase');
    MSSQLDBExtract1.ExtractDatabase();
    DBStructure1.Metadata.ExtractMetadata(memResult.Lines);

    DBStructure2.Clear();
    memLog.Lines.Add('Open ' + edtTargetDatabaseName.Text + ' DataBase');
    MSSQLDBExtract2.ExtractDatabase();
    DBStructure2.Metadata.ExtractMetadata(memResult.Lines);
  finally
    DBCConnectionADO2.Connected := False;
    DBCConnectionADO1.Connected := False;
  end;

  memLog.Lines.Add('<Extract Finished.>')
end;

procedure TForm2.btnCompareClick(Sender: TObject);
begin
  memResult.Clear();

  DBComparer1.CompareDatabases;
  memResult.Lines.BeginUpdate;
  DBComparer1.SQLExec.GetScript(memResult.Lines);
  memResult.Lines.EndUpdate;

  memLog.Lines.Add('<Comparing finished.>');
end;

procedure TForm2.btnUpdateClick(Sender: TObject);
begin
  MSSQLExec1.ExecuteScript();
end;

function AdoConnectString(WinAuth: Boolean;
                          HostName, DbName, UserName, Password: String): String;
begin
    Result := 'Provider=SQLOLEDB;' +
                        'Initial Catalog='+DbName+';';
    if HostName <> '' then Result := Result +
                        'Data Source='+HostName+';';
    if WinAuth then
    begin
      Result := Result + 'Integrated Security=SSPI;' +
                         'Persist Security Info=False;';
    end else
    begin
      Result := Result + 'Persist Security Info=True;';
      if UserName <> '' then
        Result := Result + 'User ID=' + UserName + ';';
      if Password <> '' then
        Result := Result + 'Password=' + Password + ';';
    end;
end;

procedure TForm2.DBCConnectionADO1BeforeConnect(Sender: TObject);
begin
  ADOConnection1.ConnectionString :=
    AdoConnectString(cbAuthM.Checked, edtMasterServer.Text, edtMasterDatabaseName.Text,
    edtMasterUser.Text, edtMasterPassword.Text);

  DBStructure1.Objs.MSSQLServerOptions.SQLServerVersion :=
    TMSSQLServerVersionType(cbSqlServerVersion.Items.Objects[cbSqlServerVersion.ItemIndex]);
end;

procedure TForm2.DBCConnectionADO2BeforeConnect(Sender: TObject);
begin
  ADOConnection2.ConnectionString :=
    AdoConnectString(cbAuthT.Checked, edtTargetServer.Text, edtTargetDatabaseName.Text,
    edtTargetUser.Text, edtTargetPassword.Text);

  DBStructure2.Objs.MSSQLServerOptions.SQLServerVersion :=
    TMSSQLServerVersionType(cbSqlServerVersion.Items.Objects[cbSqlServerVersion.ItemIndex]);
end;

procedure TForm2.FormCreate(Sender: TObject);
begin
  cbSqlServerVersion.Items.Clear();

  cbSqlServerVersion.Items.AddObject('MSSQL 2000', TObject(st_MSSQL2000));
  cbSqlServerVersion.Items.AddObject('MSSQL 2005', TObject(st_MSSQL2005));
  cbSqlServerVersion.Items.AddObject('MSSQL 2008', TObject(st_MSSQL2008));
  cbSqlServerVersion.Items.AddObject('MSSQL 2012', TObject(st_MSSQL2012));
  cbSqlServerVersion.Items.AddObject('MSSQL 2014', TObject(st_MSSQL2014));
  cbSqlServerVersion.Items.AddObject('MSSQL 2016', TObject(st_MSSQL2016));
  cbSqlServerVersion.Items.AddObject('MSSQL 2017', TObject(st_MSSQL2017));

  cbSqlServerVersion.ItemIndex := cbSqlServerVersion.Items.Count - 2;
end;

procedure TForm2.AddErrorMessage(Sender: TObject; ErrText: string);
begin
  memLog.Lines.Add(ErrText);
  memLog.Perform(EM_SCROLLCARET, 0, 0);
end;