Dll – Neohope's Blog

using System.Runtime.InteropServices; [DllImport("StringAW.dll", CallingConvention = CallingConvention.Winapi, CharSet = CharSet.Ansi, EntryPoint = "GetTheLastErrorA")] extern static int GetTheLastErrorA(ref IntPtr a); [DllImport("StringAW.dll", CallingConvention = CallingConvention.Winapi, CharSet = CharSet.Auto, EntryPoint = "GetTheLastErrorW")] extern static int GetTheLastErrorW(ref IntPtr w); IntPtr a = IntPtr.Zero; GetTheLastErrorA(ref a); String sa = Marshal.PtrToStringAnsi(a); MessageBox.Show(sa); IntPtr w = IntPtr.Zero; GetTheLastErrorW(ref w); String sw = Marshal.PtrToStringUni(w); MessageBox.Show(sw);

1.Test.h

#ifndef TEST_INTADD_HEADER
#define TEST_INTADD_HEADER

extern "C" int WINAPIV IntAdd(int a,int b);

#endif

2.Test.cpp

#include <windows.h>
#include "Test.h"

BOOL WINAPI DllMain(HINSTANCE hinstDLL,DWORD fdwReason,LPVOID lpReserved)
{
  UNREFERENCED_PARAMETER(hinstDLL);
  UNREFERENCED_PARAMETER(lpReserved);

  switch(fdwReason) 
  { 
    case DLL_PROCESS_ATTACH:
      break;

    case DLL_THREAD_ATTACH:
      break;

    case DLL_THREAD_DETACH:
      break;

    case DLL_PROCESS_DETACH:
      break;
  }

  return TRUE;
}

extern "C" int WINAPIV IntAdd(int a,int b)
{
  return a+b;
}

3.Test.def

LIBRARY	"Test"

EXPORTS
	IntAdd

4.test_cdll.py

#test_cdll.py
#请用__cdecl调用约定而不是__stdcall

from ctypes import *

fileName="Test.dll"
Test=cdll.LoadLibrary(fileName)
print(Test.IntAdd(2,3))

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