Get a subroutine argument’s descriptor
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WSupported on Windows
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USupported on Unix
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DESCRIP *get_xarg(DESCRIP **argblock, int arg, DESCRIP *descriptor)
Arguments
argblock
The argument block pointer passed by the Synergy DBL subroutine to the C function.
arg
The number of the argument to reference.
descriptor
A pointer to a descriptor to load.
Discussion
The get_xarg function makes a copy of a subroutine argument’s descriptor.
If the argument was passed, the return value is a pointer to the descriptor. If the argument was not passed, the returned pointer is null.
