[C#/WINFORM] PrintWindow API 함수를 사용해 윈도우 비트맵 구하기

TestProject.zip

0.01MB

▶ ShowWindowCommand.cs

namespace TestProject
{
    /// <summary>
    /// 윈도우 명령 표시
    /// </summary>
    public enum ShowWindowCommand : int
    {
        /// <summary>
        /// SW_HIDE
        /// </summary>
        SW_HIDE = 0,

        /// <summary>
        /// SW_SHOWNORMAL
        /// </summary>
        SW_SHOWNORMAL = 1,

        /// <summary>
        /// SW_SHOWMINIMIZED
        /// </summary>
        SW_SHOWMINIMIZED = 2,

        /// <summary>
        /// SW_MAXIMIZE
        /// </summary>
        SW_MAXIMIZE = 3,

        /// <summary>
        /// SW_SHOWMAXIMIZED
        /// </summary>
        SW_SHOWMAXIMIZED = 3,

        /// <summary>
        /// SW_SHOWNOACTIVATE
        /// </summary>
        SW_SHOWNOACTIVATE = 4,

        /// <summary>
        /// SW_SHOW
        /// </summary>
        SW_SHOW = 5,

        /// <summary>
        /// SW_MINIMIZE
        /// </summary>
        SW_MINIMIZE = 6,

        /// <summary>
        /// SW_SHOWMINNOACTIVE
        /// </summary>
        SW_SHOWMINNOACTIVE = 7,

        /// <summary>
        /// SW_SHOWNA
        /// </summary>
        SW_SHOWNA = 8,

        /// <summary>
        /// SW_RESTORE
        /// </summary>
        SW_RESTORE = 9
    }
}

 

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▶ POINT.cs

using System.Drawing;
using System.Runtime.InteropServices;

namespace TestProject
{
    /// <summary>
    /// 포인트
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct POINT
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region Field

        /// <summary>
        /// X
        /// </summary>
        public int X;

        /// <summary>
        /// Y
        /// </summary>
        public int Y;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - POINT(x, y)

        /// <summary>
        /// 생성자
        /// </summary>
        /// <param name="x">X 좌표</param>
        /// <param name="y">Y 좌표</param>
        public POINT(int x, int y)
        {
            X = x;
            Y = y;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Public

        #region Point 타입 암시적 변환하기 - Point(point)

        /// <summary>
        /// Point 타입 암시적 변환하기
        /// </summary>
        /// <param name="point">포인트</param>
        public static implicit operator Point(POINT point)
        {
            return new Point(point.X, point.Y);
        }

        #endregion
        #region POINT 타입 암시적 변환하기 - POINT(point)

        /// <summary>
        /// POINT 타입 암시적 변환하기
        /// </summary>
        /// <param name="point">포인트</param>
        public static implicit operator POINT(Point point)
        {
            return new POINT(point.X, point.Y);
        }

        #endregion
    }
}

 

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▶ RECT.cs

using System.Runtime.InteropServices;

namespace TestProject
{
    /// <summary>
    /// 사각형
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct RECT
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region Field

        /// <summary>
        /// 왼쪽
        /// </summary>
        public int Left;

        /// <summary>
        /// 위쪽
        /// </summary>
        public int Top;

        /// <summary>
        /// 오른쪽
        /// </summary>
        public int Right;

        /// <summary>
        /// 아래쪽
        /// </summary>
        public int Bottom;

        #endregion
    }
}

 

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▶ WINDOWPLACEMENT.cs

using System;
using System.Runtime.InteropServices;

namespace TestProject
{
    /// <summary>
    /// 윈도우 배치
    /// </summary>
    [Serializable]
    [StructLayout(LayoutKind.Sequential)]
    public struct WINDOWPLACEMENT
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region Field

        /// <summary>
        /// 길이
        /// </summary>
        public int Length;

        /// <summary>
        /// 길이
        /// </summary>
        public int Flag;

        /// <summary>
        /// 윈도우 명령 표시 여부
        /// </summary>
        public ShowWindowCommand ShowWindowCommand;

        /// <summary>
        /// 최소 위치
        /// </summary>
        public POINT MinimumPosition;

        /// <summary>
        /// 최대 위치
        /// </summary>
        public POINT MaximumPosition;

        /// <summary>
        /// 일반 사각형
        /// </summary>
        public RECT NormalRectangle;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Property
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Public

        #region 디폴트 - Default

        /// <summary>
        /// 디폴트
        /// </summary>
        public static WINDOWPLACEMENT Default
        {
            get
            {
                WINDOWPLACEMENT windowPlacement = new WINDOWPLACEMENT();

                windowPlacement.Length = Marshal.SizeOf(windowPlacement);

                return windowPlacement;
            }
        }

        #endregion
    }
}

 

▶ MainForm.cs

using System;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Import
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 전경 윈도우 구하기 - GetForegroundWindow()

        /// <summary>
        /// 전경 윈도우 구하기
        /// </summary>
        /// <returns>윈도우 핸들</returns>
        [DllImport("user32")]
        private static extern IntPtr GetForegroundWindow();

        #endregion
        #region 윈도우 배치 구하기 - GetWindowPlacement(windowHandle, windowPlacement)

        /// <summary>
        /// 윈도우 배치 구하기
        /// </summary>
        /// <param name="windowHandle">윈도우 핸들</param>
        /// <param name="windowPlacement">윈도우 배치</param>
        /// <returns>처리 결과</returns>
        [DllImport("user32", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool GetWindowPlacement(IntPtr windowHandle, out WINDOWPLACEMENT windowPlacement);

        #endregion
        #region 윈도우 인쇄하기 - PrintWindow(windowHandle, deviceContexthandle, flag)

        /// <summary>
        /// 윈도우 인쇄하기
        /// </summary>
        /// <param name="windowHandle">윈도우 핸들</param>
        /// <param name="deviceContexthandle">디바이스 컨텍스트 핸들</param>
        /// <param name="flag">플래그</param>
        /// <returns>처리 결과</returns>
        [DllImport("user32.dll", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool PrintWindow(IntPtr windowHandle, IntPtr deviceContexthandle, uint flag);

        #endregion

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

        #region 생성자 - MainForm()

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

            this.executeButton.Click += executeButton_Click;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 실행 버튼 클릭시 처리하기 - executeButton_Click(sender, e)

        /// <summary>
        /// 실행 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void executeButton_Click(object sender, EventArgs e)
        {
            Thread.Sleep(5000);

            IntPtr windowHandle = GetForegroundWindow();

            this.pictureBox.Image = GetWindowBitmap(windowHandle);
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 윈도우 비트맵 구하기 - GetBitmap(windowHandle)

        /// <summary>
        /// 윈도우 비트맵 구하기
        /// </summary>
        /// <param name="windowHandle">윈도우 핸들</param>
        /// <returns>윈도우 비트맵</returns>
        private Bitmap GetWindowBitmap(IntPtr windowHandle)
        {
            WINDOWPLACEMENT windowPlacement;

            GetWindowPlacement(windowHandle, out windowPlacement);

            int windowWidth  = windowPlacement.NormalRectangle.Right  - windowPlacement.NormalRectangle.Left + 1;
            int windowHeight = windowPlacement.NormalRectangle.Bottom - windowPlacement.NormalRectangle.Top  + 1;

            Bitmap bitmap = new Bitmap(windowWidth, windowHeight);

            using(Graphics bitmapGraphics = Graphics.FromImage(bitmap))
            {
                IntPtr deviceContextHandle = bitmapGraphics.GetHdc();

                PrintWindow(windowHandle, deviceContextHandle, 0);

                bitmapGraphics.ReleaseHdc(deviceContextHandle);

                return bitmap;
            }
        }

        #endregion
    }
}