To support older HLLAPI applications on 32-bit systems, BlueZone also supports DOS HLLAPI and 16-bit HLLAPI conversations
                  with 32-bit BlueZone. 
                  
                     Advantages
                     HLLAPI is a standard API supported by many software vendors. 
                     Disadvantages 
                     
                        
                           
                              
                              
                              
                              
                                 
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                                    The specification may be interpreted differently from vendor to vendor causing some incompatibilities. | 
                                 
                              
                           
                           
                              
                              
                              
                              
                                 
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                                    HLLAPI requires a programmer to write the application. | 
                                 
                              
                           
                           
                              
                              
                              
                              
                                 
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                                    The interface must be constantly polled by the HLLAPI application to get the status of the host screen.  | 
                                 
                              
                           
                           
                              
                              
                              
                              
                                 
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                                    For new development, the BlueZone Host Automation Object is much easier to implement, and supports a wider range of development
                                       tools.
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                     Note
If you intend on writing a program to interface with BlueZone via the HLLAPI interface, the following documents are provided
                     on the BlueZone CD-ROM or the BlueZone Image.  
                     
These documents are located in the 
DOCS\WHLLAPI  folder on the BlueZone CD-ROM or BlueZone image file.