Qt with devc++

[peace_comp]

peace..
hi everybody ..
I just started with Qt library and I have some trouble to execute some applications on devc++..
I installed qt and create a template for it on devc++... when i complile a simple programme ( hello world )..it gives no error but when i execute (run)..I've the following error> the procedure enry point .... could not be located in the dynamic link library QtCore4.dll
plz help

[jpn]

Do you have multiple versions of Qt installed? Which one is in PATH? Which one do you use for compiling your app?

[peace_comp]

Well...Actually I reinstall another version (4.3.4 ...) ..So it work for simple application ( project with only one main.cpp).

I tried to create a project with 3 files ( file.h ,file.cpp and main.cpp)

file.h:

#ifndef MYDIALOG_H
#define MYDIALOG_H
 
#include <QDialog>
 
class QLabel;
class QCheckBox;
class QTextEdit;
class QLineEdit;
class QPushButton;
 
class myDialog: public QDialog
{
    Q_OBJECT
 
public:
    myDialog(QWidget *parent=0);
 
signals:
    void findNext(const QString *str,Qt::CaseSensitivity cs);
    void findPrevious(const QString *str,Qt::CaseSensitivity cs);
 
 
private slots:
    void findClicked();
    void enableFindButton(const QString &text);
 
private:
   QLabel *lable1;
   QLineEdit *lineEdit;
   QCheckBox *case1;
   QCheckBox *case2;
   QPushButton *find;
   QPushButton *close;
};
 
 
#endif

#ifndef MYDIALOG_H
#define MYDIALOG_H

#include <QDialog>

class QLabel;
class QCheckBox;
class QTextEdit;
class QLineEdit;
class QPushButton;

class myDialog: public QDialog
{
    Q_OBJECT

public:
    myDialog(QWidget *parent=0);

signals:
    void findNext(const QString *str,Qt::CaseSensitivity cs);
    void findPrevious(const QString *str,Qt::CaseSensitivity cs);


private slots:
    void findClicked();
    void enableFindButton(const QString &text);

private:
   QLabel *lable1;
   QLineEdit *lineEdit;
   QCheckBox *case1;
   QCheckBox *case2;
   QPushButton *find;
   QPushButton *close;
};


#endif

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file.cpp ( definitions of member function)
main ( a simple instance of the class dial)

..the errors I get are linker error >>>undefined reference to myDialog::staticMetData..?
..
..

I read about Q_Object mecanism ..but I dont really know wht to do ( how to create a moc file??!!)

plz help

[jpn]

Make sure file.h is listed in .pro file and always re-run qmake after adding or removing Q_OBJECT macro.