what does a parameter modified with [IN,OUT] mean?

[xudeutsch]

hello,
i know the meaning when "out" modifies a parameter, but with "in" a
a modifier,
i am confused. Could someone explain it to me?
the code is for example " [IN,OUT] someArray[ ] mySomeArray " as
a parameter in statement of a function.

thanks a lo

--
xudeutschPosted from http://www.pcreview.co.uk/ newsgroup acces

[Jon Skeet [C# MVP]]

<xudeutsch <xudeutsch.1rjyaz@>> wrote:

i know the meaning when "out" modifies a parameter, but with "in" as
a modifier,
i am confused. Could someone explain it to me?
the code is for example " [IN,OUT] someArray[ ] mySomeArray " as
a parameter in statement of a function.

It's only relevant for remoting, as far as I know - it means that the
contents of the array needs to be copied both on the way in and on the
way out. For instance, if you had a remote Stream implementation and
your Read method didn't declare the buffer to be [In, Out] you wouldn't
read any actual data. (Spot where I've come across this... :)

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Willy Denoyette [MVP]]

"Jon Skeet [C# MVP]" <sk***@pobox.com> wrote in message
news:MP************************@msnews.microsoft.c om...

<xudeutsch <xudeutsch.1rjyaz@>> wrote:

i know the meaning when "out" modifies a parameter, but with "in" as
a modifier,
i am confused. Could someone explain it to me?
the code is for example " [IN,OUT] someArray[ ] mySomeArray " as
a parameter in statement of a function.

It's only relevant for remoting, as far as I know - it means that the
contents of the array needs to be copied both on the way in and on the
way out. For instance, if you had a remote Stream implementation and
your Read method didn't declare the buffer to be [In, Out] you wouldn't
read any actual data. (Spot where I've come across this... :)

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

It's also used in managed/unmanaged interop scenarios (PInvoke and COM),
[In, Out] must be applied when the caller needs to see the changes made by
the callee.

Willy.