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The first is a standard fixed length character variable. The second is a variable length character variable with 2 bytes to store the current length of the variable-length item. The third is identical to the second but with 4 bytes. The fourth and fifth defines a variable with 2 or 4 bytes for the length.
I ran into problems when calling a procedure (CALLPRC) from a CL program that required a parameter that was defined as a varying character. Of course I could have programmed it from a fixed length variable but it should be possible to do it directly.
An alternative and perhaps even easier could be a minor change in the CALLPRC command how a variable is passed. Now we have *BYVAL but the possibility to use *BYVAL2 and *BYVAL4 for 2 or 4 byte length might be even better and more flexible.
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