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실행중인 모든 프로세스와 현재 포커스를 갖고 있는 프로세스를 조사하고 각 프로세스의 윈도우 사이즈를 구해 보자.

 

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
 
using System.Diagnostics;
using System.Runtime.InteropServices;
 
namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        [DllImport("user32.dll")]
        private static extern IntPtr FindWindow(string className, string windowName);
        // 이 예제에서는 쓰이지 않았지만 Findwindow()는 아래와 같이 사용하면 된다.
        // IntPtr hwnd = FindWindow(className, windowName);
        // windowName = proc.ProcessName;
        // className = proc.MainWindowTitle;
 
        [DllImport("user32.dll")]
        private static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);
 
        [DllImport("user32.dll")]
        private static extern IntPtr GetForegroundWindow();
 
        [DllImport("user32.dll")]
        private static extern int GetWindowRect(IntPtr hWnd, out Rectangle rect);
 
        [DllImport("dwmapi.dll")]
        private static extern int DwmGetWindowAttribute(IntPtr hWnd, int dwAttribute, out Rectangle pvAttribute, int cbAttribute);
        
        public Form1()
        {
            InitializeComponent();
 
            timer1.Interval = 5000// 5초마다 갱신
        }
        
        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Process[] processes = Process.GetProcesses();            
            Rectangle rect;
            // GetWindowRect(), DwmGetWindowAttribute()에 의해 rect에는 아래와 같은 값이 들어간다.
            // rect.X = 좌상단 X 좌표
            // rect.Y = 좌상단 T 좌표
            // rect.Width = 우하단 X 좌표 (너비가 아니다)
            // rect.Height = 우하단 Y 좌표 (높이가 아니다)
            int rectangleSize = Marshal.SizeOf(typeof(Rectangle));
            int index;  // Process.GetProcesses()로 조사된 모든 프로세스 중 몇 번째 인지 나타낼 인덱스.
            int row = 0;    // 내용 표시 Y 위치
            string str;
 
            foreach (Process p in processes)
            { 
                // A process has a main window associated with it only if the process has a graphical interface. If the associated process
                // does not have a main window, the MainWindowHandle value is zero. The value is also zero for processes that have been hidden,
                // that is, processes that are not visible in the taskbar. This can be the case for processes that appear as icons in the
                // notification area, at the far right of the taskbar.
                // 테스크 바에 표시되는(보이는) 프로세스만 조사. 윈도우 핸들이 0(IntPtr.Zero)이 아닌 윈도우인데 그렇다고 다 보이는 건 아니다.
                if (p.MainWindowHandle != IntPtr.Zero)
                {
                    index = Array.IndexOf(processes, p); // 비효율적인 배열의 인덱스 가져오기. foreach()말고 for(;;)를 쓰는게 낫다.
                    DwmGetWindowAttribute(p.MainWindowHandle, 9out rect, rectangleSize);
                    // 9 = DWMWA_EXTENDED_FRAME_BOUNDS
                    str = string.Format("[{0}] {1}: ({2}, {3}, {4}, {5})", index, p.ProcessName, rect.X, rect.Y, rect.Width, rect.Height);
                    e.Graphics.DrawString(str, Font, Brushes.Black, 0, row);
                    row += 15;
                }
            }
            
            // 포커스를 갖고 있는 윈도우(Foreground window) 조사
            uint foregroundProcessID = 0;
            IntPtr foregroundHWnd = GetForegroundWindow(); // Get foreground window handle
            uint threadID = GetWindowThreadProcessId(foregroundHWnd, out foregroundProcessID); // Get PID from window handle
            Process foregroundProcess = Process.GetProcessById(Convert.ToInt32(foregroundProcessID)); // Get it as a C# obj.
 
            // 윈도우 사이즈 조사
            DwmGetWindowAttribute(foregroundHWnd, 9out rect, rectangleSize);
            // 9 = DWMWA_EXTENDED_FRAME_BOUNDS            
            str = string.Format("[Foreground] {0}: ({1}, {2}, {3}, {4})", foregroundProcess.ProcessName, rect.X, rect.Y, rect.Width, rect.Height);
            e.Graphics.DrawString(str, Font, Brushes.Black, 0, row);
            row += 30;
 
            // Windows 10 has thin invisible borders on left, right, and bottom, it is used to grip the mouse for resizing.
            // The borders might look like this: 7, 0, 7, 7(left, top, right, bottom)
            // 윈도우 사이즈 조사 시 예전과 같이 GetWindowRect()를 사용하면 보통 7픽셀의 resizing을 위한 테두리가 포함된다.
            e.Graphics.DrawString("[Foreground window with invisible border]", Font, Brushes.Red, 0, row);
            row += 15;
            GetWindowRect(foregroundHWnd, out rect);
            str = string.Format("[Foreground] {0}: ({1}, {2}, {3}, {4})", foregroundProcess.ProcessName, rect.X, rect.Y, rect.Width, rect.Height);
            e.Graphics.DrawString(str, Font, Brushes.Black, 0, row);
        }
 
        private void timer1_Tick(object sender, EventArgs e)
        {
            Invalidate();
        }
    }
}
 

 

소스를 입력하고 실행한다.

 

인덱스를 확인하면 수백개의 프로세스가 실행중임을 알 수 있다.

 

GetWindowRect()로 윈도우 사이즈를 구하면 resizing을 위한 보이지 않는 테두리가 포함 되므로 눈에 보이는 정확한 사이즈는 DwmGetWindowAttribute()로 구하자.

 

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Posted by J-sean
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