Features
At a high level, HACL provides a number of features not available at the EHLLAPI level. There are also a few features of EHLLAPI not currently implemented in any HACL class.
HACL unique features include:
- Connection (session) start/stop functions
- Event notification for host communications link connect/disconnect
- Event notification for connection (session) start/stop
- Comprehensive error trapping
- Generation of language-specific error message text
- No architectural limit to the number of connections (sessions); currently, Z and I Emulator for Windows is limited to 52
- Support for multiple concurrent connections (sessions) and multithreaded applications
- Row/column addressing for host presentation space
- Simplified model for presentation space
- Automatic generation of list of fields and attributes
- Keyword-based function key strings
EHLLAPI features not currently implemented in the HACL include:
- Structured field support
- OIA character images
- Lock/unlock presentation space