C# CALL CodeBlocks DLL(X64) 傳入/回傳字串(LPCSTR -> char*)

GITHUB:https://github.com/jash-git/CS-CALL-CodeBlocks-DLL

CB_BaseLib/main.h

#ifndef __MAIN_H__
#define __MAIN_H__

#include <windows.h>

/*  To use this exported function of dll, include this header
 *  in your project.
 */

#ifdef BUILD_DLL
    #define DLL_EXPORT __declspec(dllexport)
#else
    #define DLL_EXPORT __declspec(dllimport)
#endif


#ifdef __cplusplus
extern "C"
{
#endif

void DLL_EXPORT SomeFunction(const LPCSTR sometext);
LPCSTR DLL_EXPORT SomeFunction01(const LPCSTR sometext);
double DLL_EXPORT Add(double a, double b);//test_API

#ifdef __cplusplus
}
#endif

#endif // __MAIN_H__

CB_BaseLib/main.cpp

#include <iostream>
#include "main.h"
#include "stdio.h"
#define LogFile "BaseLib.log"
static int g_intDebug=1;

using namespace std;
// a sample exported function
void WriteLog(const char *Msg,int state)
{
    if(g_intDebug==1)
    {
        FILE *pf=NULL;
        if(state==1)
        {
            pf=fopen(LogFile,"w");
        }
        else
        {
            pf=fopen(LogFile,"a");
        }
        fprintf(pf,Msg);
        fprintf(pf, "\n");
        fclose(pf);
    }
}
void DLL_EXPORT SomeFunction(const LPCSTR sometext)
{
    MessageBoxA(0, sometext, "DLL Message", MB_OK | MB_ICONINFORMATION);
}

LPCSTR DLL_EXPORT SomeFunction01(const LPCSTR sometext)
{
    string Text = string(sometext);
    Text+=" by jash.liao";
    return Text.c_str();
}

double DLL_EXPORT Add(double a, double b)//test_API
{
    WriteLog("\t Add API...",0);
    return a + b;
}

extern "C" DLL_EXPORT BOOL APIENTRY DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
    switch (fdwReason)
    {
        case DLL_PROCESS_ATTACH:
            // attach to process
            // return FALSE to fail DLL load
            break;

        case DLL_PROCESS_DETACH:
            // detach from process
            break;

        case DLL_THREAD_ATTACH:
            // attach to thread
            break;

        case DLL_THREAD_DETACH:
            // detach from thread
            break;
    }
    return TRUE; // succesful
}

C#

using System;
using System.Runtime.InteropServices;

public class Program
{
    [DllImport("CB_BaseLib.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall, EntryPoint = "SomeFunction")]
    static extern void SomeFunction(String StrMsg);

    [DllImport("CB_BaseLib.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall, EntryPoint = "SomeFunction01")]
    static extern IntPtr SomeFunction01(String StrMsg);

    [DllImport("CB_BaseLib.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall, EntryPoint = "Add")]
    static extern double Add(double A,double B);

    static void Pause()
    {
        Console.Write("Press any key to continue...");
        Console.ReadKey(true);
    }
    public static void Main()
    {
        try
        {
            SomeFunction("中文 123456 ABCD");
            Console.WriteLine("SomeFunction01():" + Marshal.PtrToStringAnsi(SomeFunction01("中文 ABCD 123456")));
            Console.WriteLine("Add():" + Add(100,200));
        }
        catch (Exception e)
        {
            Console.WriteLine("C# ERROR" + e.ToString());
        }

        Pause();
    }
}