what is the advantage of INOUT parameter over OUT parameter?

[Santosh Anand]

what is the advantage of INOUT parameter over OUT parameter?

[ilikepython]

what is the advantage of INOUT parameter over OUT parameter?

I'm not sure what you are talking about. An output file you can only write to, an input file you can only read. I/o you can do both.

[RRick]

I can't think of any case, where a parameter can be only an OUT value. A parameter can be IN or INOUT.

Do you mean the difference between passing data as a parameter verus returning data with the return statement?

[weaknessforcats]

No. The OP is talking about Microsoft header annotations that are used by Microsoft analysis tools like PreFast.

With that in mind, IN means input only. INOUT means input or output. You use the one that's appropriate to your function.