HLLAPI
High Level Language Application Programming Interface (HLLAPI) is a non-standard programming interface originally developed by IBM .
A host emulation software (see host terminal system ) can be controlled with HLLAPI .
Range of functions
The HLLAPI offers around 100 different functions, for example the screen content ( presentation space ) can be read out or key presses can be sent to the host application.
Use of the HLLAPI
The HLLAPI is provided by a DLL with a central function. The function is hllapi
, HLLAPI
or WinHLLAPI
.
function(func:lpint; data:PCHAR; len:lpint; retc:lpint):integer; stdcall;
The func
HLLAPI function is selected via the parameter , and the parameters data
and are len
used for data exchange. In retc
some cases a return value (return code ) is transmitted via the parameter .
Manufacturer support
HLLAPI is supported by various manufacturers, for example
- IBM
- Attachmate
- HOB
- Intra-Sys