public ModifyRegexBasedFormatScenario(
     IWizardScenarioHost host,
     IObjectFactory fac
     )
 {
     this.host = host;
     formatDoc = new XmlDocument();
     formatDoc.LoadXml("<format><regular-grammar/></format>");
     regexPage    = fac.CreateRegexBasedFormatPage(host);
     identityPage = fac.CreateFormatIdentityPage(host, newFormatMode: false);
     optionsPage  = fac.CreateFormatAdditionalOptionsPage(host);
     savePage     = fac.CreateSaveFormatPage(host, newFormatMode: false);
     ResetFormatDocument();
 }