473,397 Members | 1,974 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,397 software developers and data experts.

Meaning of __in , __out, __in_opt

rup
What is the meaning of these keywords used before variables in a
function parameters?

__in
__out
__in_opt

Sep 28 '07 #1
1 16570
rup wrote:
What is the meaning of these keywords used before variables in a
function parameters?

__in
__out
__in_opt
These are Microsoft extensions that annotate the parameters for

__in: input parameter
__out output parameter
__in_opt: optional input parameter
Sep 28 '07 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

5
by: Richard Cornford | last post by:
I am interested in hearing opinions on the semantic meaning of FORM (elements) in HTML. I have to start of apologising because this question arose in a context that is not applicable to the...
7
by: John Baker | last post by:
HI: I see the term "Me!" in a lot of Access statements, bit don't quite know what it means. In the same contexts as wondering what the meaning if "is" is, I wonder what the meaning of "Me!" is....
4
by: RF Emmerink | last post by:
Hi, A simple question: What is the meaning of: variable >> 1 Kind regards,
388
by: maniac | last post by:
Hey guys, I'm new here, just a simple question. I'm learning to Program in C, and I was recommended a book called, "Mastering C Pointers", just asking if any of you have read it, and if it's...
19
by: ccwork | last post by:
Hi all, I am reading "C: A Reference Manual" 4th ed and I get lost for the "extern". It says that global object without specifying the storage-class specifier will have "extern" as the default...
87
by: Robert Seacord | last post by:
The SEI has published CMU/SEI-2006-TR-006 "Specifications for Managed Strings" and released a "proof-of-concept" implementation of the managed string library. The specification, source code for...
232
by: robert maas, see http://tinyurl.com/uh3t | last post by:
I'm working on examples of programming in several languages, all (except PHP) running under CGI so that I can show both the source files and the actually running of the examples online. The first...
5
by: =?Utf-8?B?Sm9seW5pY2U=?= | last post by:
Hi everyone, I am learning c# and i don´t understand a piece of code , can anyone explain the meaning of this code please. public class vector { public double? R = null; //I suppose this...
43
by: emyl | last post by:
Hi all, here's an elementary question. Assume I have declared two variables, char *a, **b; I can then give a value to a like a="hello world";
0
by: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
1
by: nemocccc | last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
0
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
0
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
0
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
0
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...
0
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.