Hi experts,
I am switching our project from Visual Studio 2005 C++ to VS 2008. It compiles almost fine, except...
One of the sources contains the code:
WINDOWINFO wi;
GetWindowInfo(m_MBParentHW
and the compile complains
[...]infoevent.cpp(1133) : error C2065: 'WINDOWINFO' : undeclared identifier
I tried to locate windows.h that should include winuser.h. However, it seem that
there is not the expected windows.h (only some for the portable devices...).
I am using Visual Studio 2008 Professional Edition patched through
the Microsoft Update service regularly (Microsoft Visual Studio 2008,
Version 9.0.30729.1 SP). I also have MSDN at hands.
I guess that it must be well known problem. Please, could you explain that
or point me to the solution?
The problem could also be caused to have more versions of Visual Studio
installed. Also, if I recall correctly, I had VS 2008 beta installed earlier.
But I think I did reinstall VS 2008 later after removing the beta (as oficially
recommended by Microsofte elsewhere).
Thanks for your time and experience,
Petr
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Yes. It is odd. The windows.h is included indirectly. The same sources compiled fine with Visual Studio 2005.
And no. I do not have PlatformSDK subdirectory at C:\Program Files\Microsoft Visual Studio 9.0\VC\. And yes, I have such subdirectory in C:\Program Files\Microsoft Visual Studio 8\VC\.
I do not know how it happened that it is not there...
After some searching, it seems to me that the PlatformSDK subdirectory was replaced by so called "Windows SDK" that is stored separately from the VS directory. I have the C:\Program Files\Microsoft SDKs\Windows\v6.0A\ with the include subdirectory and with the windows.h inside. I have found somewhere that the v6.0A is created when Visual Studio 2008 is installed.
In VS 2008 (C++) I can open menu Tools -- Options... Projects and Solutions -- VC++ Directories -- Include files
and I can read in the list:
$(WindowsSdkDir)\include
Now... How can I check what is the content of the $(WindowsSdkDir) ?
It seems that it points to somewhere else than expected.
In cmd console window, I have launched the C:\Program Files\Microsoft Visual Studio 9.0\Common7\Tools\vsvars32
set win
shows also
WindowsSdkDir=C:\Program Files\Microsoft SDKs\Windows\v6.0A\
Which is the existing directory. Then (I guess) the $(WindowsSdkDir)\include in the Tools -- Options... (see above) should point to the place where the windows.h.
When using #include <windows.h> explicitly in the file where the problem is observed, the compiler says nothing about windows.h not being found. It just reports the errors...
1>Compiling...
1>InfoEvent.cpp
1>d:\apsm3-branch\market\sr
1>d:\apsm3-branch\market\sr
1>d:\apsm3-branch\market\sr
1>d:\apsm3-branch\market\sr
1>d:\apsm3-branch\market\sr
1>d:\apsm3-branch\market\sr
1>d:\apsm3-branch\market\sr
1> type is ''unknown-type''
However, you were right (Gurudenis). After adding
#define _WIN32_WINNT 0x0501
#define _WIN32_WINDOWS 0x0500
it seems to compile fine. I had there only
#define _WIN32_WINNT 0x0400
(without #define _WIN32_WINDOWS ...)
I will check it better in Monday.
Thanks
This makes sense. So the preprocessor simply omitted the definition of WINDOWINFO in winuser.h because your project was targeting an earlier version of Windows 9x than Windows 98 (Windows 95, for instance, didn't support WINDOWINFO).
If you look at the definition of WINDOWINFO, it's defined in a conditional clause like:
#if _WIN32_WINDOWS >= x0410
which is Windows 98 or higher.
nomorefood: This is not the case. However, you cannot check my project by myself. The truth is that the .vcproj was re-created from scratch to get rid of possible balast caused by conversion of older project from VC6 through all the following version of VC++. My thanks go to you as you did try to solve the problem.
Gurudenis: You really helped to open my eyes. Thanks.
I wish you both to have very good year, because WE are creating our presence and future, not the recession ;)
Business Accounts
Answer for Membership
by: GurudenisPosted on 2009-01-09 at 04:20:32ID: 23334769
Can you find windows.h in "<VS_FOLDER>\VC\PlatformSDK\
Also make sure you have this in your stdafx.h:
#define _WIN32_WINNT 0x0501
#define _WIN32_WINDOWS 0x0500
(or some other values to target any system higher than Windows 98 and NT 3.0).
Last but not least, make sure that your code actually includes windows.h. If the file were missing, the #include directive would be the one giving errors rather than the reference to WINDOWINFO, so your the message you got strikes me as odd.