The TN3270 Plus WinHLLAPI support allows you to write Windows applications that communicate with midrange or mainframe computers via TN3270 Plus terminal emulation.
TN3270 Plus WinHLLAPI supports most of the functions in the Windows HLLAPI Version 1.1 specification. See WinHLLAPI Unsupported Functions for a list of functions that TN3270 Plus does not support.
How WinHLLAPI Support Works
Your application needs to load the Whllapi.dll (32-bit) or Whllapi64.dll (64-bit) distributed with TN3270 Plus. Once this is done, your application may call the Whllapi functions to send data to, or receive data from, the host computer. Whllapi.dll and Whllapi64.dll are extensions of TN3270 Plus and TN3270 Plus to send data to, or receive data from, the host computer.
TN3270 Plus is continually being improved. To learn more about the latest enhancements, please review our Version History web page.