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HCL Domino Designer User Guide and Reference
This guide provides information on using HCL Domino Designer and programming language reference information.
LotusScript® Language
Welcome to the LotusScript® Language section of Domino® Designer Help.
Introduction to LotusScript®
This chapter introduces LotusScript® and describes, in general terms, how to use the script editor to write and modify scripts, how to compile scripts, and how to use the debugger to locate problems in the logic of your applications.
Debugging applications
The debugger helps you find logic errors in an application. If your application compiles without errors but does not yield the results you expect, the debugger can help locate the place in your scripts where something went wrong. The debugger can:

HCL Domino Designer User Guide and Reference
This guide provides information on using HCL Domino Designer and programming language reference information.
- What's new in Domino Designer 14?
  The following features are new for developers in HCL Domino® Designer 14.
- What's new in Nomad Designer?
  HCL Nomad for web browsers v1.0.10 introduces the capability to design Notes databases. For more information, see HCL Nomad for web browsers User Documentation, Nomad web Designer.
- Accessibility and keyboard shortcuts
  Accessibility features assist users who have a disability, such as restricted mobility or limited vision, to use information technology content successfully.
- Application Design
  Welcome to the Application Design section of Domino® Designer Help.
- Application Management
  Welcome to the Application Management section of Domino® Designer Help.
- Domino® Query Language
  Domino® Query Language (DQL) is a facility running on a Domino server that provides a terse, shorthand syntax for finding documents. It supports a wide variety and complexity of search terms. It leverages existing design elements, avoiding the need to write detailed code to access them. DQL consolidates all methods in Domino for searching document contents.
- Composite Applications - Design and Management
  Composite applications are a key element in a service-oriented architecture (SOA) and contextual collaboration strategy. The ability to create and edit composite applications lets you easily integrate different types of components and technologies.
- DB2® Access views
  Domino® Designer includes two types of design elements to assist you in managing data contained in DB2® enabled Notes® databases:
- Programming Overview and User Interface
  This section contains general guidelines and examples that show where to use Java, LotusScript, and the formula language.
- Formula Language
  This section documents the formula language.
- LotusScript® Language
  Welcome to the LotusScript® Language section of Domino® Designer Help.
  - Introduction to LotusScript®
    This chapter introduces LotusScript® and describes, in general terms, how to use the script editor to write and modify scripts, how to compile scripts, and how to use the debugger to locate problems in the logic of your applications.
    - What is LotusScript®?
      LotusScript® is an embedded, BASIC scripting language with a powerful set of language extensions that enable object-oriented application development within and across HCL software applications. LotusScript allows you to place more complex scripts in a greater variety of locations and events than traditional macros. LotusScript and its development toolset provide a common programming environment across HCL applications on all platforms supported by HCL software (such as Windows™, AIX®, Linux™). It is available in HCL Notes®.
    - Advantages of LotusScript®
      LotusScript® offers the following advantages:
    - Working with scripts
      A script is composed of statements in the LotusScript® language. LotusScript code can be organized into applications, modules, sections, functions, and statements.
    - Working with HCL software
      HCL software provides the environment in which you create, debug, and run LotusScript® modules. Each HCL software application that works with LotusScript supplies its own application programming interface (API), which lets you use product functionality and create and manipulate product objects from within LotusScript. A product API is effectively an extension to the LotusScript language that is available when you are running that product.
    - Debugging applications
      The debugger helps you find logic errors in an application. If your application compiles without errors but does not yield the results you expect, the debugger can help locate the place in your scripts where something went wrong. The debugger can:
  - Script and Statement Construction Rules
    This chapter describes the rules for writing the basic elements of a script in the LotusScript® language.
  - Data Types, Constants, and Variables
    This chapter provides information about LotusScript® constants and variables and the data types of the values that they can represent.
  - Expressions and Operators
    This chapter describes the set of LotusScript® operators, how they may be combined with operands to form expressions, and how those expressions are evaluated.
  - Procedures: Functions, Subs, and Properties
  - File Handling
    This chapter describes file handling in the LotusScript® language.
  - Error Processing
    This chapter describes error processing in the LotusScript® language.
  - User-Defined Data Types and Classes
    This chapter describes two kinds of custom data structures that you can define in LotusScript®. Each can hold data of different types in a single data structure.
  - Managing Flow in Scripts
    The flow of execution of a script generally follows the sequence of statements in the script. This chapter describes the behavior of particular statements that alter the flow of execution.
  - Managing Asynchronous Web Agents in Domino®
    This chapter describes how to use multiple threads and synchronization to manage HTTP agents with Domino®.
  - Beyond Core LotusScript®
    This chapter discusses the role that LotusScript® plays with HCL products, your operating environment, other programs, and interactive user applications.
  - LotusScript® Language Reference
    This chapter describes the use of statements, built-in functions, subs, data types, and directives in the LotusScript® language.
  - Language and Script Limits
    This appendix describes LotusScript® language limits of several kinds: for example, the legal ranges in data representation, the limits on numerical specifications within statements, and the maximum number of different kinds of elements that can be defined in a script.
  - Platform Differences
    The LotusScript® language and functionality on the UNIX™ platform, the Macintosh platform, and the IBM i® platform differ in various ways from the language and functionality described in the rest of this language reference. This appendix describes the differences.
  - LotusScript/REXX Integration
    This appendix provides an overview of REXX integration in the LotusScript® language.
  - LotusScript® Aliases
    This appendix lists the LotusScript® aliases and their equivalent text.
  - MIME Charset Names
  - Compile-time Error Messages
    This chapter describes the compile-time error messages in the LotusScript® language.
  - Run-time Error Messages
    This chapter describes the run-time error messages in the LotusScript® language.
- LotusScript/COM/OLE Classes
- Java/CORBA Classes
  This section documents the Java/CORBA classes.
- Connectors
  Connectors provide native access to a wide variety of DBMS products, ODBC, the platform File system, Enterprise Resource Planning systems, and Transaction Processing systems.
- Javadoc™ for Domino® Designer related APIs
  As part of providing additional Java™ reference documentation, Domino® Designer ships with a help plugin that contains Javadoc™ for additional Domino Designer related APIs.

Debugging applications

The debugger helps you find logic errors in an application. If your application compiles without errors but does not yield the results you expect, the debugger can help locate the place in your scripts where something went wrong. The debugger can:

Run the application until LotusScript® reaches a breakpoint or Stop statement. A breakpoint is a statement at which you want to interrupt application execution.
Execute one statement, then stop and give control to the debugger.

When you run an application with the debugger, the application is either running or interrupted.

When you debug an application, some HCL software applications allow you to inspect variables and edit their values. For more information, see the product documentation.