먼저 Visual Studio에서 C++ Win32 DLL 프로젝트를 만든다.
그리고 아래 코드를 넣고 빌드한다.
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extern "C" __declspec(dllexport) int getINT()
{
return -1;
}
extern "C" __declspec(dllexport) void getINTPtr(int *val)
{
*val = -1;
}
extern "C" __declspec(dllexport) void getINTRef(int &val)
{
val = -1;
}
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다음으로 Visual Studio에서 C# Console Application프로젝트를 만든다.
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
class DllWrapper
{
[DllImport("test_c_dll.dll")]
public static extern int getINT();
[DllImport("test_c_dll.dll")]
public static extern int getINTPtr(ref int num);
[DllImport("test_c_dll.dll")]
public static extern int getINTRef(ref int num);
}
class Program
{
static void Main(string[] args)
{
int num = 0;
num = DllWrapper.getINT();
Console.WriteLine("getINT(): " + num.ToString());
num = 0;
DllWrapper.getINTPtr(ref num);
Console.WriteLine("getINTPtr(): " + num.ToString());
num = 0;
DllWrapper.getINTRef(ref num);
Console.WriteLine("getINTPtr(): " + num.ToString());
}
}
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Output:
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getINT(): -1
getINTPtr(): -1
getINTPtr(): -1
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