Progress
External Program
Interfaces
HLC and Progress
HLC provides access to third-party application program interfaces from your 4GL applications, similar to using shared libraries in the Windows environment (see the "UNIX Shared Library and Windows DLL Support" section).
Figure 1–1 shows a top-down structure diagram for a Progress 4GL application that calls your application functions using HLC.
Figure 1–1: Progress Application Calling Functions With HLC
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