Problem updating to .net

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Altman - 14 Jul 2004 14:52 GMT

We just recently got an MSDN subscription and obtained a copy of .Net. I am
trying to convert a VC++ 6.0 code to .net and when I try to build it I get
the following error
C:\Program Files\Microsoft Visual Studio .NET
2003\Vc7\atlmfc\include\atlcom.h(144): error C2065: 'COINIT_MULTITHREADED' :
undeclared identifier

I have limited experience with C++ and I cannot figure this out. The error
is in the header file made by microsoft. How can this be? This seems to be
the only error that I am getting though. Are there any other things in
converting that I should watch out for? Also, in order to run this program
on another machine do they need have the .Net Framework installed?

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William DePalo [MVP VC++] - 14 Jul 2004 19:25 GMT

> C:\Program Files\Microsoft Visual Studio .NET
> 2003\Vc7\atlmfc\include\atlcom.h(144): error C2065: 'COINIT_MULTITHREADED'
:
> undeclared identifier

OK.

> I have limited experience with C++ and I cannot figure this out.

Here is a hint that you can use to solve a similar problem on your own the
next time. Highlight or double-click a "token" in your source. Click the
right mouse button and choose "Go to definition" from the context menu. I
haven't tried that but you should be taken here in <objbase.h>

#if (_WIN32_WINNT >= 0x0400 ) || defined(_WIN32_DCOM) // DCOM
// These constants are only valid on Windows NT 4.0
COINIT_MULTITHREADED = 0x0, // OLE calls objects on any thread.
COINIT_DISABLE_OLE1DDE = 0x4, // Don't use DDE for Ole1 support.
COINIT_SPEED_OVER_MEMORY = 0x8, // Trade memory for speed.
#endif // DCOM

The first check makes sure you are running on an NT platform (NT/2K/XP/2K+3)
at least as recent as version 4.00. The second checks if the target as
distributed COM installed.

To fix the problem add this line

#define _WIN32_WINNT 0x0400

if you only intend to support NT kernels or

#define _WIN32_DCOM

if you presume DCOM has been installed.

Alternatively you can set the defines in your project settings of the C++
options.

Regards,
Will

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Altman - 14 Jul 2004 21:18 GMT

Thanks for the reply but I am still having problems. First off I have
#define _WIN32_WINNT 0x0400 in my stdafx.h file and I noticed that has the
include for atlcom.h. Shouldn't this be enough? Anyway I did add the
#define to my objbase.h and I didn't get that error but I then get these
errors

PortMonitor error LNK2005: __fltused already defined in
atlmincrt.lib(atlinit.obj)
PortMonitor error LNK2005: _malloc already defined in
atlmincrt.lib(atlinit.obj)
PortMonitor error LNK2005: _free already defined in
atlmincrt.lib(atlinit.obj)
PortMonitor error LNK2005: _realloc already defined in
atlmincrt.lib(atlinit.obj)
PortMonitor warning LNK4222: exported symbol 'DllCanUnloadNow' should not be
assigned an ordinal
PortMonitor warning LNK4222: exported symbol 'DllGetClassObject' should not
be assigned an ordinal
PortMonitor warning LNK4222: exported symbol 'DllRegisterServer' should not
be assigned an ordinal
PortMonitor warning LNK4222: exported symbol 'DllUnregisterServer' should
not be assigned an ordinal
PortMonitor warning LNK4006: __fltused already defined in
atlmincrt.lib(atlinit.obj); second definition ignored
PortMonitor warning LNK4006: _malloc already defined in
atlmincrt.lib(atlinit.obj); second definition ignored
PortMonitor warning LNK4006: _free already defined in
atlmincrt.lib(atlinit.obj); second definition ignored
PortMonitor warning LNK4006: _realloc already defined in
atlmincrt.lib(atlinit.obj); second definition ignored
PortMonitor error LNK2001: unresolved external symbol ___xt_z
PortMonitor error LNK2001: unresolved external symbol ___xt_a
PortMonitor error LNK2001: unresolved external symbol ___xp_z
PortMonitor error LNK2001: unresolved external symbol ___xp_a
PortMonitor fatal error LNK1120: 4 unresolved externals

And this I really have no clue on. I'm sorry, I feel like an idiot but I am
pretty fresh out of college and the main language they taught there was
Java, and my other languages are like VB, and VFP, and JavaScript so it is a
little different, then I get out in the workplace and get a job where I am
the only programmer trying to update code that was written 5 years ago and I
have no one that has experience in C++ to ask. I can understand the basic
syntax of the language but its all this extra stuff that throws me off.

>> C:\Program Files\Microsoft Visual Studio .NET
>> 2003\Vc7\atlmfc\include\atlcom.h(144): error C2065:
[quoted text clipped - 38 lines]
> Regards,
> Will

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valkavales - 17 Mar 2005 12:03 GMT

Try to change compiler options RunTimeLibrary -> Single-Threaded
Multi-Threade

-
valkavale

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Problem updating to .net

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