how to export dll with gui?

[cutie.monkey]

hi guys, im current having problem in exporting dll, e.i, i want to export my dll with gui and its class functions. currently i can export a dll like this:

#ifdef Q_WS_WIN
#define MY_DLL __declspec(dllexport)
#else
#define MY_DLL
#endif

extern "C" MY_DLL int sum(int a, int b)
{
return (a + b);
}

now my question is, how can i export dll with gui as well as its class functions? many thnks

[yogeshgokul]

now my question is, how can i export dll with gui as well as its class functions? many thnks

You can look into Qt-Plugins for this purpose.
http://doc.trolltech.com/4.5/plugins-howto.html#the-lower-level-api-extending-qt-applications

[cutie.monkey]

i think exporting plugins is different from exporting dll with class functions. anyway thnks for your reply.. any help would be very much appreciated..

[squidge]

Is the code project article series by Mahmoud Komeily any good for you?

http://www.codeproject.com/KB/DLL/Dllfun.aspx

Admittingly it is aimed at MSVC, but it still might be helpful.

[Fastman]

But, what problem ???
for example:

....
typedef string (CALLBACK* EXECSQL)(string, string, int);
typedef int      (CALLBACK* MSGBOX) (string, int);
 
class SCRIPTENGINE_EXPORT ScriptEngine
{
public:
 
	 ScriptEngine();
	 ~ScriptEngine();
 
	bool	LoadScripts(string);
	void 	Clear();
	int     CallFunction(string cFunction, ScriptVal sVal, string& cOut);
	void    GetLastError(string &cError);
 
	void	SetPtrExecSql(EXECSQL pfnExecSql);
	void	SetPtrMsgBox (MSGBOX pfnMsgBox);
 
private:
 
	string		m_Scripts;
	string		m_Error;
 
};

....
typedef string (CALLBACK* EXECSQL)(string, string, int);
typedef int      (CALLBACK* MSGBOX) (string, int);

class SCRIPTENGINE_EXPORT ScriptEngine
{
public:
	 
	 ScriptEngine();
	 ~ScriptEngine();

	bool	LoadScripts(string);
	void 	Clear();
	int     CallFunction(string cFunction, ScriptVal sVal, string& cOut);
	void    GetLastError(string &cError);

	void	SetPtrExecSql(EXECSQL pfnExecSql);
	void	SetPtrMsgBox (MSGBOX pfnMsgBox);
	
private:
	
	string		m_Scripts;
	string		m_Error;
	
};

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scriptengine_global.h

#ifndef SCRIPTENGINE_GLOBAL_H
#define SCRIPTENGINE_GLOBAL_H
 
#include <QtGlobal>
 
#ifdef SCRIPTENGINE_LIB
	#define SCRIPTENGINE_EXPORT Q_DECL_EXPORT
#else
	#define SCRIPTENGINE_EXPORT Q_DECL_IMPORT
#endif
#endif // SCRIPTENGINE_GLOBAL_H

#ifndef SCRIPTENGINE_GLOBAL_H
#define SCRIPTENGINE_GLOBAL_H

#include <QtGlobal>

#ifdef SCRIPTENGINE_LIB
	#define SCRIPTENGINE_EXPORT Q_DECL_EXPORT
#else
	#define SCRIPTENGINE_EXPORT Q_DECL_IMPORT
#endif
#endif // SCRIPTENGINE_GLOBAL_H

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[cutie.monkey]

But, what problem ???

currently i can export and call dll but without gui. now, what im trying to do is to add ui in my dll then call it from my application.