C / C++ / MFC

Wischkony wrote:

Maybe i am totaly wrong, but i think, i got the error because setting a default value for a struct can not be done so easy.

Wischkony wrote:

I am sry,...aeh this is embarrasing...

Mark Salsbery
Microsoft MVP - Visual C++

George_George wrote:

extern CFoo foo;

CFoo foo2;

class __declspec (dllexport) CFoo 
{
public:	
    CFoo();	
    int foo1();	
    int foo2();
};

__declspec (dllexport) CFoo foo;re>

Foo.cpp
<pre>#include "Foo.h"

CFoo::CFoo()
{	
    return;
}
int CFoo::foo1()
{	
    return 100;
}
int CFoo::foo2()
{	
    return 200;
}

and here is the console based application code -
Foo.h

class __declspec (dllimport) CFoo
{
public:	
    CFoo();	
    int foo1();	
    int foo2();
};

__declspec (dllimport) CFoo foo; 

test.cpp
#include "foo.h"
int main()
{	
    int i = foo.foo1();	
    i = foo.foo2();	
    return 0;
}

Don't forget to set the dependency to Foo.lib file in the test project settings.
Hope this will help.

George_George wrote:

CFoo foo;

George_George wrote:

extern CFoo foo;

George_George wrote:

could I use extern to refer to the variable and use it?

George_George wrote:

So, from learning from you, it is legal to expose both function/global variable/class from a DLL?

// foo.h

#ifdef _DLLPROJ_
#define DLLEXP __declspec (dllexport)
#else 
#define DLLEXP __declspec (dllimport)
#endif

DLLEXP class CFoo
{
public:

	DLLEXP int foo1();

	DLLEXP int foo2();
};

DLLEXP class CFooImpl : CFoo
{
public:

	DLLEXP CFooImpl();

	DLLEXP int foo1();

	DLLEXP int foo2();
};

// dllmain.cpp

#include "foo.h"

CFooImpl::CFooImpl()
{
	return;
}

int CFooImpl::foo1()
{
	return 100;
}

int CFooImpl::foo2()
{
	return 200;
}

DLLEXP CFooImpl foo;

// main.cpp

#include "foo.h"

DLLEXP CFooImpl foo;

int main()
{
	CFooImpl foo1;

	int i = foo.foo1();
	i = foo.foo2();

	return 0;
}

George_George wrote:

DLLEXP class CFoo

#if!defined(COMMONLIB_API)
#ifdef COMMONLIB_EXPORTS
#define COMMONLIB_API __declspec(dllexport)
#else
#define COMMONLIB_API __declspec(dllimport)
#endif
#endif

namespace MyAppLibrary {

   class MessageReporter {

      public:

         //ctor
         COMMONLIB_API MessageReporter();

         //Add new reporting function
         COMMONLIB_API static void AddReportFunction(ReportFnPtr func);

         //Set MessageReporter Level on or off
         COMMONLIB_API static void SetReporterLevel(Level lev, bool on);

         //Set all levels to on
         COMMONLIB_API static void AllLevelsOn() {repLevels=~0;}

         //Set all levels to off
         COMMONLIB_API static void AllLevelsOff() {repLevels=0;}
   };
};