custom dll for multicharts [SOLVED]

idnotbe · Postby **idnotbe** » 02 Aug 2013

To test custom dll, i built the following C++ codes. (Win7 32bit, VS 2012 Express)

// DllTest.h



#pragma once



__declspec(dllexport) int __stdcall add(int a, int b);

Code: Select all

// DllTest.cpp



#include "stdafx.h"



#include "DllTest.h"



int __stdcall add(int a, int b)

{

	return a+b;

}

Code: Select all

// indicator (power language)



external: "C:\Users\xxx\Desktop\DllTest\Debug\DllTest.dll", int, "add", int, int;



messagelog(add(1,2));

when i insert the indicator, i got

Error in study "DllTest"::Can't find function "add" in dll.

what's wrong?
I can view the "add" function through the application called "DLL EXPORT VIEWER"

Dru · Postby **Dru** » 05 Aug 2013

Code: Select all

// DllTest.h



#pragma once



extern "C" __declspec(dllexport) int __stdcall add(int a, int b);

idnotbe · Postby **idnotbe** » 05 Aug 2013

i solved the problem.

i think it's because of the compiler or the platform settings in visual studio.
i am developing on 64bit environments and when i set the target platform to 64bit in visual studio 2012 express, it works.

anyway, thanks dru.

gnimnek168 · Postby **gnimnek168** » 30 Nov 2015

Hi idnotbe:

I had the same problem as you.
My IDE is Visual Studio 2015 Community, Windows 10-64bit, Multicharts 64bit 9.1.

I had changed the build platform to x64, but the error is same.
Can you attach your new solution file for this testdll ?

Thanks for your kindly share~

gnimnek168 · Postby **gnimnek168** » 30 Nov 2015

The problem I had solved.

Because I use the project for DllExport & DllImport，and then must expose the methods by extern "C" keyword (powerlanage can call the exposed methods). the below definition code :

MCExtfuncs.h

Code: Select all


#pragma once



#ifdef MCExtFuncs_API_EXPORT

#define MCExtFuncs_API	__declspec( dllexport )

#else

#define MCExtFuncs_API	__declspec( dllimport )

#endif



#include <string>



#ifdef __cplusplus

extern "C" {

#endif

	MCExtFuncs_API	void MCWrite(std::string FQDN);

#ifdef __cplusplus

}

#endif

custom dll for multicharts [SOLVED]

custom dll for multicharts

Re: custom dll for multicharts [SOLVED]

Re: custom dll for multicharts

Re: custom dll for multicharts

Re: custom dll for multicharts