var instance = new Vintasoft.Imaging.Office.UI.WebSpreadsheetDocumentEditorControlJS(settings);

var value; // Type: any

// Parameters
var xlsxPageLayoutSettingsType; // Type: WebXlsxPageLayoutSettingsTypeEnumJS
var successFunc; // Type: function
var errorFunc; // Type: function

value = instance.exportXlsxToPdf(xlsxPageLayoutSettingsType, successFunc, errorFunc);