atlcom.h - ClassesAllowedInStream undefined

Question

Hi,
since the latest update last week, i cant compile my extenstion code.
my project is compiled and static linked to ATL,
but since the latest update there is an error on atlcom.h
ClassesAllowedInStream is not defined.

what should i do?

Answer 1

Which version of Visual Studio do you have?
Do you have Windows SDK installed? If so, which version?

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Visual C++ MVP

Answer 2

I had the same problem unfortunately installer did not update atlcomcli.h file

Answer 3

i have a very old windows sdk 6.
i'll update and hope it will fix the problem

Answer 4

I suggest you uninstall Windows SDK 6 and then reinstall the security update after you install the Windows SDK 6.1.

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Visual C++ MVP

Answer 5

Hi Sheng,

I have tried your way and the files atlcom.h and atlcomcli.h are updated, but still no ClassesAllowedInStream defined in the atlcomcli.h.

The followings are attributes of the updated atlcomcli.h

size: 67,956 bytes

date: ‎2009‎/‎7/‎11, ‏‎19:40:46 (created and modified)

Any idea?

Answer 6

Forgot to say, my system is VISTA + VS2005 + SDK6.1

BTW, my another machine, XP + VS2008 + SDK6.1 is also updated and everything is OK.

Answer 7

Hi,

I'm lost in the same mystery.

The following lines in atlcom.h gives me C2146 syntax error:

#if !defined(_ATL_DLL_IMPL) && !defined(_ATL_DLL)
	ClassesAllowedInStream rgclsidAllowed;
	DWORD cclsidAllowed;
#endif

I cannot recall installing anything that could have changed atlcom.h (only installed Windows updates lately). Yet my atlcom.h differs from the one of my collegues, running the same projects and tools. And unlike me, theirs successfully build.

I run a 64-bit Vista SP1. We use Visual C++ 2008 and we got the project configuration property Use of ATL set to Not Using ATL. My atlcom.h is from 2009-07-10, half past ten a friday night! (I'm positive I was playing Dungeons & Dragons at that time.)

I see no option at the moment but to reinstall Visual Studio. :P

JOG

Answer 8

After disabling vista UAC and reinstalling the  security update (KB971090). The file atlcomcli.h is really updated. Problem gone.

Hope it helps for other people who are facing same problem:-)

Answer 9

I had to reinstall Visual Studio to resolve this error. My trial and error approach, step by step, follows here:

I uninstalled and reinstalled the Windows SDK from here:

http://www.microsoft.com/downloads/details.aspx?FamilyId=E6E1C3DF-A74F-4207-8586-711EBE331CDC&displaylang=en

I ran the Visual Studio 2008 Service Pack 1 ATL Security Update:

http://www.microsoft.com/downloads/details.aspx?familyid=294DE390-3C94-49FB-A014-9A38580E64CB&displaylang=en

But the problem remained. None of these actions changed the atlcom.h file and the compiler did still not recognize ClassesAllowedInStream.

So, last resort: Reinstalling VS2008. I run the Microsoft Visual Studio 2008 Setup from the CD to uninstall, but it fails with the informative message: "A problem has been encountered while loading the setup components. Canceling setup."

Fortunally, the Automated uninstall tool works, found at:

http://msdn.microsoft.com/en-us/vstudio/bb968856.aspx

Installing Visual Studio from the CD again, and running Windows Updates.

It BUILDS! Success! ^_^ Joy!

The atlcom.h file is now dated ‎5 ‎august ‎2007, ‏‎06:51:44. Maybe something went wrong in the update that dissyncrhonized C-files in the VC/atlmfc directory, what do I know...

JOG

Answer 10

you just got the old version back,
you will probably get the update again next time or even worse,
you will not get the update and have your application built with the old unsecure version of ATL.

Answer 11

Well observed, Itai, I mixed up the dates as well. The atlcom.h file is really still dated ‎10 ‎july ‎2009. Idk if that really is the one of the update. And atlcomcli.h is ‎11 ‎july ‎2009.

I already ran the updates though, and Windows Update center says that my Windows is up to date. So it should be the proper version, and something else was wrong last time. No? 

How did yours resolve, Itai?

Answer 12

i didnt yet, i just use the old files for now, untill i'll find the time to update the windows sdk

Answer 13

Hi,

I'm lost in the same mystery.

The following lines in atlcom.h gives me C2146 syntax error:

#if !defined(_ATL_DLL_IMPL) && !defined(_ATL_DLL)

	ClassesAllowedInStream rgclsidAllowed;

	DWORD cclsidAllowed;

#endif

I cannot recall installing anything that could have changed atlcom.h (only installed Windows updates lately). Yet my atlcom.h differs from the one of my collegues, running the same projects and tools. And unlike me, theirs successfully build.

I run a 64-bit Vista SP1. We use Visual C++ 2008 and we got the project configuration property Use of ATL set to Not Using ATL. My atlcom.h is from 2009-07-10, half past ten a friday night! (I'm positive I was playing Dungeons & Dragons at that time.)

I see no option at the moment but to reinstall Visual Studio. :P

JOG

Same problem to me.

Windows 7 + VS 2008 anything completely upgraded. atlcom.h is from 2009-07-10.

Please help!

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Alessio

Answer 14

Alessio,

Try to Reinstall Visuall Studio, and then run Windows Update.

JOG

Answer 15

When I ran into this problem today, I followed some suggestions in this thread and then applied the following:

Security Update for Microsoft Visual Studio 2005 Service Pack 1 ATL for Smart Devices (KB973673)
Security Update for Microsoft Visual Studio 2008 Service Pack 1 ATL for Smart Devices (KB973675)
Security Update for Microsoft Visual Studio 2008 Service Pack 1 (KB971092)

The problem occured with Visual Studio 2008 SP1 and applying the above three Updates solved it.

No restart required, either.

Hope this helps!

Answer 16

All,

I recently installed VS2008 with SP1 on new Win installation. The project conpiles fine on a different machine with a similar config (only difference was that VS2005 existed there).
All errors are coming from AtlCom.h header.

There seems to be something wrong with this file version but a missing update to atlcom.h is out of question as the machine is new.

Thanks

Answer 17

All,

The last post by SlyW helped me fix the issue.

Thanks

Answer 18

SlyW's solution did it for me.
I now have a "little" issue with odbcss.h. If Unicode is not defined, then it tries to typedef char as DBCHAR.

I will keep digging to see what I can find.

But big thanks for the posting. I worked for most of yesterday reinstalling XP/VS2008/SQLExpress2008/patches, etc...

Answer 19

It worked for me. I am using VS2008 SP1 on Win 7. After applying following patch it resolved the issue,

Security Update for Microsoft Visual Studio 2008 Service Pack 1 ATL for Smart Devices (KB973675)
Security Update for Microsoft Visual Studio 2008 Service Pack 1 (KB971092)

Thanks SlyW

Answer 20

I had installed VS2008 SP1 on an XP box and was getting this same issue.

Applying following patches resolved this issue for me too,

Security Update for Microsoft Visual Studio 2008 Service Pack 1 ATL for Smart Devices (KB973675)
Security Update for Microsoft Visual Studio 2008 Service Pack 1 (KB971092)

Thanks SlyW.

Answer 21

I had installed VS2008 SP1 on an Windows 7 box and was getting this same issue.

Applying following patches resolved this issue for me too,

Security Update for Microsoft Visual Studio 2008 Service Pack 1 ATL for Smart Devices (KB973675)
Security Update for Microsoft Visual Studio 2008 Service Pack 1 (KB971092)

Thanks SlyW.

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may the force be with you

Answer 22

I'm using VS 2005, and I had repeatedly tried reinstalling VS80sp1-KB971090-X86-INTL, I even tried turning off UAC, restarting computer and compiling.

Then I installed

Security Update for Microsoft Visual Studio 2005 Service Pack 1 ATL for Smart Devices (KB973673)

tried compiling, but still no luck.

The I cleaned the project I had the problem with, compiled and I was ok.

So I can't say whether just turning off UAC and installing KB971090 would have worked if I had cleaned the project at that point...

 

Answer 23

New 64 bit W7 machine, same problem after installing SP1.

 

This was the solution for me:

Security Update for Microsoft Visual Studio 2008 Service Pack 1 (KB971092)

It failed installing first time so I tried again - and after that all is working (well, for now at least)

 

Up and running!

Answer 24

thanks, is useful to me.i reinstall my computer 

Answer 25

How to uninstall windows SDK? as the Windows 6.0 is installed in my machine along with Visual Studio 2008, I could not find an option to remove it.

 

I have following versions of Visual Studio installed in my machine.

• Visual Studio 2005
• Visual Studio 2008
• Visual Studio 2010

The issue occurs with VS 2005. uninstalling certain SDKs may affect the other installations.

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--@sarat

Answer 26

Add $(VCInstallDir)PlatformSDK\include in include file. That may essentially solve the problem

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-Sarath. My blog - http://codereflect.com/