C / C++ / MFC

Product  //abstract         Creator  //abstract
+Method()                    +FactoryMethod()
  |                                |
  |                                |
  |                                |
ConcreteProduct<-------------ConcreteCreator
+Method()            +FactoryMethod()-----return new ConcreteProduct

<br />
Factory* fac = new ConcreteFactory();<br />
Product* p = fac->CreateProduct();<br />

<br />
Product* p = new CreateProduct();<br />
//use p to initialize member variable Product* _p;<br />
Factory* fac = new ConcreteFactory(p);<br />

sashoalm wrote:

But it never enters the cycle - __argc is 0.

class CommandLineParser : public CCommandLineInfo
{
public:
	// called by ParseCommandLine
	virtual void ParseParam( LPCTSTR lpszParam, BOOL bFlag, BOOL bLast )
	{
		...............
	}
};

BOOL CMyWinApp::InitInstance()
{
	AfxEnableControlContainer();

	// Standard initialization
	// If you are not using these features and wish to reduce the size
	//  of your final executable, you should remove from the following
	//  the specific initialization routines you do not need.

#ifdef _AFXDLL
	Enable3dControls();			// Call this when using MFC in a shared DLL
#else
	Enable3dControlsStatic();	// Call this when linking to MFC statically
#endif

	...............

	// parse the command line
	CommandLineParser parser(m_aFileList);
	ParseCommandLine(parser);

	...............

	// Since the dialog has been closed, return FALSE so that we exit the
	//  application, rather than start the application's message pump.
	return FALSE;
}

CCommandLineInfo cmdInfo;
ParseCommandLine(cmdInfo);

Mark Salsbery
Microsoft MVP - Visual C++

int argc = __argc;
char* arg1 = __argv[0];
char* arg2 = __argv[1];
char* arg3 = __argv[2];
CommandLineParser parser(m_aFileList);
ParseCommandLine(parser);

CCommandLineInfo cmdInfo;
ParseCommandLine(cmdInfo);

sashoalm wrote:

The MFC dll is linked to a different CRT than the exe.

Mark Salsbery
Microsoft MVP - Visual C++

Mark Salsbery wrote:

I have no idea what you're talking about.

sashoalm wrote:

I was thinking that there are two copies of __argc and __argv, one for the EXE and one for the MFC DLLs

Mark Salsbery
Microsoft MVP - Visual C++

#if     defined(_DLL) && defined(_M_IX86)

#define __argc      (*__p___argc())     /* count of cmd line args */
#define __argv      (*__p___argv())     /* pointer to table of cmd line args */
_CRTIMP int *          __cdecl __p___argc(void);
_CRTIMP char ***       __cdecl __p___argv(void);

#else

_CRTIMP extern int __argc;          /* count of cmd line args */
_CRTIMP extern char ** __argv;      /* pointer to table of cmd line args */

#endif

/*
 * Functions to access user-visible, per-process variables
 */

/*
 * Macro to construct the name of the access function from the variable
 * name.
 */
#define AFNAME(var) __p_ ## var

/*
 * Macro to construct the access function's return value from the variable
 * name.
 */
#define AFRET(var)  &var

_CRTIMP int * __cdecl
AFNAME(__argc) (void)
{
        return AFRET(__argc);
}

/*
 * Macro to construct the access function's return value from the variable
 * name.
 */
#define AFRET(var)  &var

sashoalm wrote:

My project is not a dll, and using MFC as a shared DLL is the default in AppWizard. The only thing I've tweaked is setting the CRT to multithreaded dll instead of singlethreaded.

Mark Salsbery
Microsoft MVP - Visual C++

LINK : warning LNK4098: defaultlib "MSVCRT" conflicts with use of other libs; use /NODEFAULTLIB:library

Matthew Faithfull wrote:

Somewhere a link in this chain has broken and no command line parameters have been stored or passed on to the next stage