DLL export problem

[hrcariaga]

Unfortunately it's not correct. You can't hardcode Q_DECL_EXPORT like that. You must use Q_DECL_EXPORT when building the library and Q_DECL_IMPORT when using the library. For more details, see this thread: Q_DECL_EXPORT and Q_DECL_IMPORT.

i've changed my first code to this:

in .h

#ifndef DIALOGIMPL_H
#define DIALOGIMPL_H
#include <QDialog>
#include "ui_dialog.h"
 
#ifndef _DLL_BUILD_
    #if (defined(QT_DLL) || defined(QT_SHARED)) && !defined(QT_PLUGIN)
        #define EXPORT Q_DECL_EXPORT
    #else
        #define EXPORT
    #endif
#else
        #define EXPORT Q_DECL_IMPORT
#endif 
 
 
class EXPORT DialogImpl : public QDialog, public Ui::Dialog
{
Q_OBJECT
public:
	DialogImpl( QWidget * parent = 0, Qt::WFlags f = 0 );
	void ShowMessage();
private slots:
};
 
EXPORT void ShowMessage();
#endif

#ifndef DIALOGIMPL_H
#define DIALOGIMPL_H
#include <QDialog>
#include "ui_dialog.h"

#ifndef _DLL_BUILD_
    #if (defined(QT_DLL) || defined(QT_SHARED)) && !defined(QT_PLUGIN)
        #define EXPORT Q_DECL_EXPORT
    #else
        #define EXPORT
    #endif
#else
        #define EXPORT Q_DECL_IMPORT
#endif 


class EXPORT DialogImpl : public QDialog, public Ui::Dialog
{
Q_OBJECT
public:
	DialogImpl( QWidget * parent = 0, Qt::WFlags f = 0 );
	void ShowMessage();
private slots:
};

EXPORT void ShowMessage();
#endif

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in .cpp

#include "dialogimpl.h"
#include <QMessageBox>
 
EXPORT DialogImpl::DialogImpl( QWidget * parent, Qt::WFlags f) 
	: QDialog(parent, f)
{
	setupUi(this);
	ShowMessage();
}
 
EXPORT void DialogImpl::ShowMessage()
{
	QMessageBox::information(this, tr("DLL"),"DLL exported!");
}

#include "dialogimpl.h"
#include <QMessageBox>

EXPORT DialogImpl::DialogImpl( QWidget * parent, Qt::WFlags f) 
	: QDialog(parent, f)
{
	setupUi(this);
	ShowMessage();
}

EXPORT void DialogImpl::ShowMessage()
{
	QMessageBox::information(this, tr("DLL"),"DLL exported!");
}

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i have build the program without error but still the .dll can't be access by delphi..

hmm, is there any suggestion on how i can solve my problem?

thanks..