[SOLVED]Strange error when using the poco lib with VC++ 2005

[athkou]

Hello again. I'm trying to use the Poco MySQL classes with an windows application. The errors that I receive are annoying because the identifiers that the compiler cannot found are functions from the win32 library. The functions are TryEnterCriticalSection and CreateMutex. You might think that I dump on you my troubles but I cannot help myself. This topic and this did not solve my problem. The inclusion order in my project is the following:

In main.cpp:

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#include <windows.h>
#include <commctrl.h>
#include "restest.h"
#include "MySQLDatabase.h"


In MySQLDatabase.h:

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#include <string>
#include "Poco/Data/Common.h"
#include "Poco/Data/Session.h"
#include "Poco/Data/MySQL/Connector.h"


Adding the windows header file in MySQLDatabase.h befor or after the poco includes does not change anything. If I remove MySQLDatabase.h from the project the errors are gone but that is not a solution. Is there a reason for these strange errors, and most important is there any solution?

I am using Visual C++ 2005 Standard edition

[alex]

If I recall correctly, sometimes WINVER=0x0500 helps with this.

[athkou]

Thanks for that hint alex With your help and looking little deeper in the poco library I find a solution that removes my errors. I will post my solution, maybe someone find it useful

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// In main.h
// Allow use of features W2K and later
#ifndef NTDDI_VERSION     
#define NTDDI_VERSION NTDDI_WIN2K

#endif //NTDDI_VERSION

// Allow use of features W2K and later
#ifndef WINVER           
#define WINVER 0x0500       

#endif //WINVER

// Allow use of features specific to W2K or later
#ifndef _WIN32_WINNT
#define _WIN32_WINNT WINVER   

#endif //_WIN32_WINNT

// needed for CreateMutex
#define POCO_NO_UNWINDOWS


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// In main.cpp

#include "main.h"
#include <windows.h>
// ...