About Legacy APIs

HostExplorer provides the following existing or “legacy” APIs:

• EHLLAPI (Extended High Level Language Application Programming Interface) and WinHLLAPI (Windows HLLAPI)—Allow other Windows programs (for example, Attachmate® Extra! for Windows) to communicate and control HostExplorer terminal emulators.
• DDE (Dynamic Data Exchange)—A tool that allows programs (for example, Microsoft Excel, Word, and Visual Basic) to communicate with the HostExplorer 3270 emulator.

While these APIs are less efficient and use larger and more rigid objects than COM and OHIO, you can still use them to write applications and thus avoid rewriting your own code. HostExplorer’s support of these earlier APIs helps maximize an organization’s investment in its development.