You can provide accessibility information about the custom UI components that display text.

1. Import the required interfaces.

   import net.rim.device.api.ui.accessibility.AccessibleContext;
   import net.rim.device.api.ui.accessibility.AccessibleText;
   

   AccessibleContext provides the basic accessibility information about a custom UI component. AccessibleText provides the information about the text in a custom UI component that displays text.
2. Create a class that extends the Field class and implements AccessibleContext and AccessibleText.

   public class AccessibleTextClass extends Field 
     implements AccessibleContext, AccessibleText 
   {
   }
   

3. Create the variables to store the information about the custom UI component's state and contents.

   private int _state;
   private int _cursor, _anchor;
   private String _text;
   private Vector _lines; 
   private Vector _words; 
   

4. Implement AccessibleText.getAtIndex(int part, int index) to provide access to the text at a given position.

   public String getAtIndex(int part, int index)
   {
     switch(part) 
     {
       case AccessibleText.CHAR:
         return String.valueOf(_text.charAt(index));
                   
       case AccessibleText.LINE:
         return (String) _lines.elementAt(index);
                   
       case AccessibleText.WORD:
         return (String) _words.elementAt(index);
     }
           
     return null;
   }   
   

5. Implement AccessibleText.getSelectionStart() to provide access to the position of the first character of text that a BlackBerry® device user selects. Return 0 if the user cannot select text.

   public int getSelectionStart() 
   {
     return _anchor;
   }
   

6. Implement AccessibleText.getSelectionEnd() to provide access to the position of the last character of text that a BlackBerry device user selects. Return 0 if the user cannot select text.

   public int getSelectionEnd() 
   {
     return _cursor;
   }
   

7. Implement AccessibleText.getCaretPosition() to provide access to the position of the cursor within the text. Return 0 if the user cannot select text.

   public int getCaretPosition() 
   {
     return _cursor;
   }
   

8. Implement AccessibleText.getSelectionText() to provide access to the selected part of the text.

   public String getSelectionText() 
   {
     int start = getSelectionStart();
     int end = getSelectionEnd();
     if (start<end) {
       return _text.getText(start,end);
     } else {
       return _text.getText(end,start);
     }
   }
   

9. Implement AccessibleText.getLineCount() to provide access to the number of lines of text.

   public int getLineCount()
   {
     return _lines.size();
   }
   

10. Implement AccessibleText.getCharCount() to provide access to the number of characters in the text.

    public int getCharCount()
    {
      return _text.length();
    }