Error-Handling Functions
  Use the following statements and functions to define the way LibreOffice Basic reacts to run-time errors.
  
  LibreOffice Basic offers several methods to prevent the termination of a program when a run-time error occurs.
  
      
      
      将字符串表达式或数字表达式转换为 "Error" 子类型的变量表达式。
     
  
  
返回一个错误代码,用于标识程序执行过程中出现的错误。
 
  
      
     
     Use VBA Err object to raise or handle runtime errors.
      
  
  
Returns the error message that corresponds to a value or raises a given error context.
 
  
  
      
      Resets error information and indicates what to execute next.
    
  
  
  
  The Exception service is a collection of methods to assist in code debugging in Basic and Python scripts and in error handling in Basic scripts.
  In Basic scripts, when a run-time error occurs, the methods and properties of the Exception service help identify the error context and allow to handle it.