entry point not found in dynamic link library in VC++

[skinkairewalker]

Hey guys, how are you all?
I'm trying to make a dll for C++, but I'm having a lot of headaches...

I'm using the code in purebasic below:

Code: Select all

Declare ConvertString(String.s)
DeclareCDLL.i HelloW(msg.i)

Procedure ConvertString(String.s)
  Size=StringByteLength(String)
  If Size>0
   Protected *Ptr=AllocateMemory(Size+2)
   If *Ptr
     PokeS(*Ptr, String, Size, #PB_Ascii)
     ProcedureReturn *Ptr
   EndIf
 EndIf
EndProcedure

ProcedureCDLL.i HelloW(msg.i)
	ProcedureReturn ConvertString(PeekS(msg))
EndProcedure

and declaring it like this in C++

Code: Select all

#include <iostream>
#include <iomanip>
#include <string>
#include <cstdlib>

#include <windows.h>

using namespace std;


extern "C" __declspec(dllimport) char* __cdecl HelloW(const char* msg);

int main()
{

    std::string nome = "This is a string example";

    const char* nomeCStr = nome.c_str();

    char* result = HelloW(nomeCStr);

    std::cout << "dll pb test!\n";
    std::cout << result;


}

and when running the c++ application I get this error:

Could not find HelloW procedure entry point in dynamic link library

screenshot console : https://prnt.sc/0Lp2cgH-wor0

screenshot dll exported in release folder : https://prnt.sc/EQvDFbahmMMa

Can someone help me understand and resolve?

[chi]

Hi, you probably forgot to include the import lib when compiling in VC++. Copy MgmCore.lib to the .dll and add a reference to Project/... Properties/Linker/Input/Additional Dependencies...

[skinkairewalker]

I referenced it this way:
screenshot : https://prnt.sc/QB0-RSrKtOAU

[chi]

Then I don't know, works here... Had to change to PokeS(*Ptr, String, Size, #PB_Unicode) tho

[jassing]

32 vs 64 bit?

[skinkairewalker]

I managed to solve it after several attempts to configure the visual c++ correctly.