[C#/WPF] HwndHost 클래스 : Win32 컨트롤 호스트하기

■ WPF는 응용 프로그램을 만들기 위한 풍부한 환경을 제공한다. 그러나 Win32 코드에 상당한 투자가 있는 경우 WPF 응용 프로그램에서 해당 코드 중 일부를 완전히 다시 작성하는 것보다 재사용하는 것이 더 효과적일 수 있다. WPF는 WPF 페이지에서 Win32 창을 호스팅하기 위한 간단한 메커니즘을 제공한다.

TestProject.zip

0.01MB

▶ ControlHost.cs

using System;
using System.Runtime.InteropServices;
using System.Windows.Interop;

namespace TestProject
{
    /// <summary>
    /// 컨트롤 호스트
    /// </summary>
    public class ControlHost : HwndHost
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Import
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 윈도우 생성하기 (확장) - CreateWindowEx(extendedStyle, className, windowName, style, x, y, width, height,
            parentWindowHandle, menuHandle, instanceHandle, parameter)

        /// <summary>
        /// 윈도우 생성하기 (확장)
        /// </summary>
        /// <param name="extendedStyle">확장 스타일</param>
        /// <param name="className">클래스명</param>
        /// <param name="windowName">윈도우명</param>
        /// <param name="style">스타일</param>
        /// <param name="x">X</param>
        /// <param name="y">Y</param>
        /// <param name="width">너비</param>
        /// <param name="height">높이</param>
        /// <param name="parentWindowHandle">부모 윈도우 핸들</param>
        /// <param name="menuHandle">메뉴 핸들</param>
        /// <param name="instanceHandle">인스턴스 핸들</param>
        /// <param name="parameter">매개 변수</param>
        /// <returns>윈도우 핸들</returns>
        [DllImport("user32", EntryPoint = "CreateWindowEx", CharSet = CharSet.Unicode)]
        private static extern IntPtr CreateWindowEx
        (
            int    extendedStyle,
            string className,
            string windowName,
            int    style,
            int    x,
            int    y,
            int    width,
            int    height,
            IntPtr parentWindowHandle,
            IntPtr menuHandle,
            IntPtr instanceHandle,
            [MarshalAs(UnmanagedType.AsAny)] object parameter
        );

        #endregion
        #region 윈도우 제거하기 - DestroyWindow(windowHandle)

        /// <summary>
        /// 윈도우 제거하기
        /// </summary>
        /// <param name="windowHandle">윈도우 핸들</param>
        /// <returns>처리 결과</returns>
        [DllImport("user32", EntryPoint = "DestroyWindow", CharSet = CharSet.Unicode)]
        private static extern bool DestroyWindow(IntPtr windowHandle);

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// WS_CHILD
        /// </summary>
        private const int WS_CHILD = 0x40000000;

        /// <summary>
        /// WS_VISIBLE
        /// </summary>
        private const int WS_VISIBLE = 0x10000000;

        /// <summary>
        /// LBS_NOTIFY
        /// </summary>
        private const int LBS_NOTIFY = 0x00000001;

        /// <summary>
        /// HOST_ID
        /// </summary>
        private const int HOST_ID = 0x00000002;

        /// <summary>
        /// LISTBOX_ID
        /// </summary>
        private const int LISTBOX_ID = 0x00000001;

        /// <summary>
        /// WS_VSCROLL
        /// </summary>
        private const int WS_VSCROLL = 0x00200000;

        /// <summary>
        /// WS_BORDER
        /// </summary>
        private const int WS_BORDER = 0x00800000;

        /// <summary>
        /// 호스트 너비
        /// </summary>
        private readonly int hostWidth;

        /// <summary>
        /// 호스트 높이
        /// </summary>
        private readonly int hostHeight;

        /// <summary>
        /// 호스트 윈도우 핸들
        /// </summary>
        private IntPtr hostWindowHandle;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Property
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 리스트 박스 윈도우 핸들 - ListBoxWindowHandle

        /// <summary>
        /// 리스트 박스 윈도우 핸들
        /// </summary>
        public IntPtr ListBoxWindowHandle { get; private set; }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - ControlHost(width, height)

        /// <summary>
        /// 생성자
        /// </summary>
        /// <param name="width">너비</param>
        /// <param name="height">높이</param>
        public ControlHost(double width, double height)
        {
            this.hostWidth  = (int)width;
            this.hostHeight = (int)height;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Protected

        #region 윈도우 코어 만들기 - BuildWindowCore(parentHandleRef)

        /// <summary>
        /// 윈도우 코어 만들기
        /// </summary>
        /// <param name="parentHandleRef">부모 핸들 참조</param>
        /// <returns>핸들 참조</returns>
        protected override HandleRef BuildWindowCore(HandleRef parentHandleRef)
        {
            ListBoxWindowHandle = IntPtr.Zero;

            this.hostWindowHandle = IntPtr.Zero;

            this.hostWindowHandle = CreateWindowEx
            (
                0,
                "static",
                "",
                WS_CHILD | WS_VISIBLE,
                0,
                0,
                this.hostWidth,
                this.hostHeight,
                parentHandleRef.Handle,
                (IntPtr)HOST_ID,
                IntPtr.Zero,
                0
            );

            ListBoxWindowHandle = CreateWindowEx
            (
                0,
                "listbox",
                "",
                WS_CHILD | WS_VISIBLE | LBS_NOTIFY | WS_VSCROLL | WS_BORDER,
                0,
                0,
                this.hostWidth,
                this.hostHeight,
                this.hostWindowHandle,
                (IntPtr)LISTBOX_ID,
                IntPtr.Zero,
                0
            );

            return new HandleRef(this, this.hostWindowHandle);
        }

        #endregion
        #region 윈도우 프로시저 처리하기 - WndProc(windowHandle, message, wordParameter, longParameter, handled)

        /// <summary>
        /// 윈도우 프로시저 처리하기
        /// </summary>
        /// <param name="windowHandle">윈도우 핸들</param>
        /// <param name="message">메시지</param>
        /// <param name="wordParameter">WORD 매개 변수</param>
        /// <param name="longParameter">LONG 매개 변수</param>
        /// <param name="handled">처리 여부</param>
        /// <returns>핸들</returns>
        protected override IntPtr WndProc(IntPtr windowHandle, int message, IntPtr wordParameter, IntPtr longParameter, ref bool handled)
        {
            handled = false;

            return IntPtr.Zero;
        }

        #endregion
        #region 윈도우 코어 제거하기 - DestroyWindowCore(windowHandleRef)

        /// <summary>
        /// 윈도우 코어 제거하기
        /// </summary>
        /// <param name="windowHandleRef">윈도우 핸들 참조</param>
        protected override void DestroyWindowCore(HandleRef windowHandleRef)
        {
            DestroyWindow(windowHandleRef.Handle);
        }

        #endregion
    }
}

 

▶ MainWindow.xaml

<Window x:Class="TestProject.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Width="800"
    Height="600"
    Title="TestProject"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <DockPanel
        Margin="10"
        Background="LightGreen">
        <Border Name="hostBorder" DockPanel.Dock="Right"
            HorizontalAlignment="Right"
            VerticalAlignment="Top"
            Margin="10"
            Width="200"
            Height="250"
            BorderThickness="3"
            BorderBrush="LightGray" />
    <StackPanel>
        <Label
            HorizontalAlignment="Center"
            Margin="0 10 0 0"
            FontWeight="Bold">
            Control the Control
        </Label>
        <TextBlock Margin="10 10 10 10">
            Selected Text : <TextBlock Name="selectedTextBlock" />
        </TextBlock>
        <TextBlock Margin="10 10 10 10">
            Number of Items : <TextBlock Name="itemCountTextBlock" />
        </TextBlock>
        <Line
            HorizontalAlignment="Center"
            Margin="0 20 0 0"
            X1="0"
            X2="500"
            StrokeThickness="2"
            Stroke="LightYellow" />
        <Label
            HorizontalAlignment="Center"
            Margin="10 10 10 10">
            Append an Item to the List
        </Label>
        <StackPanel Orientation="Horizontal">
            <Label
                HorizontalAlignment="Left"
                Margin="10 10 10 10">
                Item Text
            </Label>
            <TextBox Name="appendTextBox"
                HorizontalAlignment="Left"
                Margin="10 10 10 10"
                Width="200"
                VerticalContentAlignment="Center" />
        </StackPanel>
        <Button Name="appendButton"
            HorizontalAlignment="Left"
            Margin="10 10 10 10"
            Width="100"
            Height="30">
            Append
        </Button>
        <Line
            HorizontalAlignment="Center"
            Margin="0 20 0 0"
            X1="0"
            X2="500"
            StrokeThickness="2"
            Stroke="LightYellow" />
        <Label
            HorizontalAlignment="Center"
            Margin="10 10 10 10">
            Delete the Selected Item
        </Label>
        <Button Name="deleteButton"
            HorizontalAlignment="Left"
            Margin="10 10 10 10"
            Width="100"
            Height="30">
            Delete
        </Button>
    </StackPanel>
  </DockPanel>
</Window>

 

▶ MainWindow.xaml.cs

using System;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows;

namespace TestProject
{
    /// <summary>
    /// 메인 윈도우
    /// </summary>
    public partial class MainWindow : Window
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Import
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 메시지 보내기 - SendMessage(windowHandle, message, wordParameter, longParameter)

        /// <summary>
        /// 메시지 보내기
        /// </summary>
        /// <param name="windowHandle">윈도우 핸들</param>
        /// <param name="message">메시지</param>
        /// <param name="wordParameter">WORD 매개 변수</param>
        /// <param name="longParameter">LONG 매개 변수</param>
        /// <returns>처리 결과</returns>
        [DllImport("user32", EntryPoint = "SendMessage", CharSet = CharSet.Unicode)]
        private static extern int SendMessage(IntPtr windowHandle, int message, IntPtr wordParameter, IntPtr longParameter);

        #endregion
        #region 메시지 보내기 - SendMessage(windowHandle, message, wordParameter, longParameter)

        /// <summary>
        /// 메시지 보내기
        /// </summary>
        /// <param name="windowHandle">윈도우 핸들</param>
        /// <param name="message">메시지</param>
        /// <param name="wordParameter">WORD 매개 변수</param>
        /// <param name="longParameter">LONG 매개 변수</param>
        /// <returns>처리 결과</returns>
        [DllImport("user32", EntryPoint = "SendMessage", CharSet = CharSet.Unicode)]
        private static extern int SendMessage(IntPtr windowHandle, int message, int wordParameter, [MarshalAs(UnmanagedType.LPWStr)] StringBuilder longParameter);

        #endregion
        #region 메시지 보내기 - SendMessage(windowHandle, message, wordParameter, longParameter)

        /// <summary>
        /// 메시지 보내기
        /// </summary>
        /// <param name="windowHandle">윈도우 핸들</param>
        /// <param name="message">메시지</param>
        /// <param name="wordParameter">WORD 매개 변수</param>
        /// <param name="longParameter">LONG 매개 변수</param>
        /// <returns>처리 결과</returns>
        [DllImport("user32", EntryPoint = "SendMessage", CharSet = CharSet.Unicode)]
        private static extern IntPtr SendMessage(IntPtr windowHandle, int message, IntPtr wordParameter, string longParameter);

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// WM_COMMAND
        /// </summary>
        private const int WM_COMMAND = 0x00000111;

        /// <summary>
        /// LB_SEL_CHANGE
        /// </summary>
        private const int LB_SEL_CHANGE = 0x00000001;

        /// <summary>
        /// LB_GET_CUR_SEL
        /// </summary>
        private const int LB_GET_CUR_SEL = 0x00000188;

        /// <summary>
        /// LB_GET_TEXT_LEN
        /// </summary>
        private const int LB_GET_TEXT_LEN = 0x0000018A;

        /// <summary>
        /// LB_ADD_STRING
        /// </summary>
        private const int LB_ADD_STRING = 0x00000180;

        /// <summary>
        /// LB_GET_TEXT
        /// </summary>
        private const int LB_GET_TEXT = 0x00000189;

        /// <summary>
        /// LB_DELETE_STRING
        /// </summary>
        private const int LB_DELETE_STRING = 0x00000182;

        /// <summary>
        /// LB_GET_COUNT
        /// </summary>
        private const int LB_GET_COUNT = 0x0000018B;

        /// <summary>
        /// 리스트 박스 핸들
        /// </summary>
        private IntPtr listBoxHandle;

        /// <summary>
        /// 항목 수
        /// </summary>
        private int itemCount;

        /// <summary>
        /// 컨트롤 호스트
        /// </summary>
        private ControlHost controlHost;

        /// <summary>
        /// 선택 항목 인덱스
        /// </summary>
        private int selectedItemIndex;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainWindow()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainWindow()
        {
            InitializeComponent();

            Loaded                  += Window_Loaded;
            this.appendButton.Click += appendButton_Click;
            this.deleteButton.Click += deleteButton_Click;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region 윈도우 로드시 처리하기 - Window_Loaded(sender, e)

        /// <summary>
        /// 윈도우 로드시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void Window_Loaded(object sender, EventArgs e)
        {
            this.controlHost = new ControlHost(this.hostBorder.ActualWidth, this.hostBorder.ActualHeight);

            this.hostBorder.Child = this.controlHost;

            this.controlHost.MessageHook += controlHost_MessageHook;

            this.listBoxHandle = this.controlHost.ListBoxWindowHandle;

            for(int i = 0; i < 15; i++)
            {
                string itemText = "Item" + i;

                SendMessage(this.listBoxHandle, LB_ADD_STRING, IntPtr.Zero, itemText);
            }

            this.itemCount = SendMessage(this.listBoxHandle, LB_GET_COUNT, IntPtr.Zero, IntPtr.Zero);

            this.itemCountTextBlock.Text = this.itemCount.ToString();
        }

        #endregion
        #region 컨트롤 호스트 메시지 후킹 처리하기 - controlHost_MessageHook(windowHandle, message, wordParameter, longParameter, handled)

        /// <summary>
        /// 컨트롤 호스트 메시지 후킹 처리하기
        /// </summary>
        /// <param name="windowHandle">윈도우 핸들</param>
        /// <param name="message">메시지</param>
        /// <param name="wordParameter">WORD 매개 변수</param>
        /// <param name="longParameter">LONG 매개 변수</param>
        /// <param name="handled">처리 여부</param>
        /// <returns>핸들</returns>
        private IntPtr controlHost_MessageHook(IntPtr windowHandle, int message, IntPtr wordParameter, IntPtr longParameter, ref bool handled)
        {
            int textLength;

            handled = false;

            if(message == WM_COMMAND)
            {
                switch((uint) wordParameter.ToInt32() >> 16 & 0xffff)
                {
                    case LB_SEL_CHANGE :

                        this.selectedItemIndex = SendMessage(this.controlHost.ListBoxWindowHandle, LB_GET_CUR_SEL, IntPtr.Zero, IntPtr.Zero);

                        textLength = SendMessage(this.controlHost.ListBoxWindowHandle, LB_GET_TEXT_LEN, IntPtr.Zero, IntPtr.Zero);

                        StringBuilder stringBuilder = new StringBuilder();

                        SendMessage(this.listBoxHandle, LB_GET_TEXT, this.selectedItemIndex, stringBuilder);

                        this.selectedTextBlock.Text = stringBuilder.ToString();

                        handled = true;

                        break;
                }
            }

            return IntPtr.Zero;
        }

        #endregion
        #region Append 버튼 클릭시 처리하기 - appendButton_Click(sender, e)

        /// <summary>
        /// Append 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void appendButton_Click(object sender, EventArgs e)
        {
            if(this.appendTextBox.Text != string.Empty)
            {
                SendMessage(this.listBoxHandle, LB_ADD_STRING, IntPtr.Zero, this.appendTextBox.Text);
            }

            this.itemCount = SendMessage(this.listBoxHandle, LB_GET_COUNT, IntPtr.Zero, IntPtr.Zero);

            this.itemCountTextBlock.Text = this.itemCount.ToString();
        }

        #endregion
        #region Delete 버튼 클릭시 처리하기 - deleteButton_Click(sender, e)

        /// <summary>
        /// Delete 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void deleteButton_Click(object sender, EventArgs e)
        {
            this.selectedItemIndex = SendMessage(this.controlHost.ListBoxWindowHandle, LB_GET_CUR_SEL, IntPtr.Zero, IntPtr.Zero);

            if(this.selectedItemIndex != -1)
            {
                SendMessage(this.listBoxHandle, LB_DELETE_STRING, (IntPtr) this.selectedItemIndex, IntPtr.Zero);
            }

            this.itemCount = SendMessage(this.listBoxHandle, LB_GET_COUNT, IntPtr.Zero, IntPtr.Zero);

            this.itemCountTextBlock.Text = this.itemCount.ToString();
        }

        #endregion
    }
}