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Important Observations
- Functions are called locally using the CALL command. The CALL can pass a working list into the called function.
- The called function must have a RCV_LIST() defined on its FUNCTION statement.
- Passed working lists must be identically defined, in caller and called function.
- The EXCHANGE command enables an "exchange list" of fields to be passed into the called function.
- A called function uses EXCHANGE to return fields to the caller.
- Remote functions running on the server are called using CALL_SERVER_FUNCTION.
- The CALL_SERVER_FUNCTION can handle passing and returning working lists and the fields exchange list.
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- How to CALL a function.
- How to use the EXCHANGE command to pass field values into a called function.
- How to use CALL_SERVER_FUNCTION.
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