C# WPF Call VC++ DLL

標題：C# WPF呼叫C++ DLL動態函式庫
C++ (CppDLL.h)：

#pragma once
using namespace System;

namespace CppDLL {
    public ref class MyClass
    {
        public:
        int Multiply(int x, int y)
        {
            return x * y;
        }
    };
}

WPF (MainWindow.xaml)：

<Window x:Class="CSharpCaller.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Button Content="Click Me" Height="30" HorizontalAlignment="Left" Margin="20,20,0,0" Name="btn" VerticalAlignment="Top" Width="100" Click="btn_Click" />
        <TextBlock Height="30" HorizontalAlignment="Left" Margin="20,70,0,0" Name="tbk" Text="Show up here" VerticalAlignment="Top" Width="100" />
    </Grid>
</Window>

C# (MainWindow.xaml.cs)：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace CSharpCaller
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        private void btn_Click(object sender, RoutedEventArgs e)
        {
            CppDLL.MyClass test = new CppDLL.MyClass();
            tbk.Text = test.Multiply(2, 4).ToString();
        }
    }
}

結果：

說明：
使用C# WPF呼叫C++函式庫進行乘法運算的簡單範例，
建立Visual C++ CLR Class Library專案，編譯DLL函式庫，
建立Visual C# WPF Application專案，加入References的DLL檔案，
編譯後即可執行。