Terms

The following definitions help you to understand the process of creating an External Action Block:

External Action Block—CA Gen External Action Blocks are created using the workstation Design Toolset. An External Action Block contains only an EXTERNAL statement; it contains no logic of its own. The External Action Block is called by a USE statement in a procedure step or action block that is also created with this toolset.
Stub—When you generate the External Action Block, a program skeleton called a stub, is created. This includes much of the working storage and linkage section to provide a framework for the External Action Block. External action block stubs are designed to be generated once, modified by the user and subsequently maintained manually. The External Action Block is a modified stub. You modify the stub by adding either a call to the existing subroutine or the subroutine logic itself.
External Subroutine—The External Subroutine is an existing Subroutine outside of CA Gen program logic or transaction you want to access from the application generated through CA Gen.