wpf call VC ++ dll

Environmental VS2010

 

DllDemo.h // 

#pragma Once 

the using the System namespace; 

namespace DllDemo { 

	public class MyValue REF 
	{ 
		// the TODO: such a method is here added. 
		value int; 
	public: MyValue () 
			{ 
				value = 123456789; 
			} 

	public: int PRINTVALUE () 
			{ 
				return value; 
			} 
	}; 
}

　　

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;

using System.Runtime.InteropServices;

using DllDemo;

namespace WXDWXT_WPF
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {

        MyValue myv1;
        public MainWindow()
        {
            InitializeComponent();

            myv1 = new MyValue();
        }
        


        private void button1_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("" + myv1.printValue());
        }
    }
}