1 // MyDll.h
 2 
 3 #pragma once
 4 #include <cstdio>
 5 #include <cstring>
 6 using namespace System;
 7 
 8 namespace MyDll {
 9 
10     public ref class MyClass
11     {
12         // TODO:  在此处添加此类的方法。
13     public:
14         MyClass()
15         {}
16     public:
17         static bool TestFunc(char* outPutStr, int *p)
18         {
19             *p = 10;
20             char* s = "Hello world";
21             strcpy_s(outPutStr, 32, s);
22             return true;
23         }
24     };
25 }

1 // 这是主 DLL 文件, MyDll.cpp
2 
3 #include "stdafx.h"
4 
5 #include "MyDll.h"

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 using System.Windows;
 7 using System.Windows.Controls;
 8 using System.Windows.Data;
 9 using System.Windows.Documents;
10 using System.Windows.Input;
11 using System.Windows.Media;
12 using System.Windows.Media.Imaging;
13 using System.Windows.Navigation;
14 using System.Windows.Shapes;
15 using System.Runtime.InteropServices;
16 
17 namespace MyWPF
18 {
19     /// <summary>
20     /// MainWindow.xaml 的交互逻辑
21     /// </summary>
22     public partial class MainWindow : Window
23     {
24         public MainWindow()
25         {
26             InitializeComponent();
27         }
28 
29         private void Button_Click(object sender, RoutedEventArgs e)
30         {
31             unsafe
32             {
33                 string str = new string('A', 32);
34                 IntPtr intPtrStr = (IntPtr)Marshal.StringToHGlobalAnsi(str);
35                 sbyte* sbyteStr = (sbyte*)intPtrStr;
36 
37                 int p = 0;
38                 MyDll.MyClass.TestFunc(sbyteStr, &p);
39 
40                 String tmp = new String(sbyteStr);
41                 MessageBox.Show(tmp);
42                 MessageBox.Show(p.ToString());
43             }
44         }
45     }
46 }