通过窗口句柄获取程序路径

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace WpfApplication1
{
    class WindowListItem : DragItem
    {
        private TaskBarWindow taskBarWindow;
        public WindowListItem(TaskBarWindow taskBarWindow)
        {
            InitializeComponent();
            this.Content.Content = taskBarWindow.title;
            this.taskBarWindow = taskBarWindow;
            BitmapImage image = new BitmapImage(new Uri(@"F:	emp.png", UriKind.Absolute));
            this.Icon.Source = GetIcon();
            
        }

        public override void onItemClick()
        {
            MainWindow.mainWindow.Hide();
            Win32.ShowWindow(this.taskBarWindow.hwnd.ToInt32(), 9);
            Win32.SetForegroundWindow(this.taskBarWindow.hwnd.ToInt32());
        }

        [DllImport("psapi.dll")]
        static extern uint GetModuleFileNameEx(IntPtr hProcess, IntPtr hModule, [Out] StringBuilder lpBaseName, [In] [MarshalAs(UnmanagedType.U4)] int nSize);

        [System.Runtime.InteropServices.DllImport("shell32.dll")]
        private static extern int ExtractIconEx(string lpszFile, int niconIndex, IntPtr[] phiconLarge, IntPtr[] phiconSmall, int nIcons);  

        public static IntPtr getAppIconFromWindowHandle(IntPtr hwnd)
        {
            int pId = 0;
            IntPtr pHandle = IntPtr.Zero;
            Win32.GetWindowThreadProcessId(hwnd, ref pId);
            pHandle = Win32.OpenProcess(1040, 0, pId);
            StringBuilder sb = new StringBuilder(512);
            GetModuleFileNameEx(pHandle, IntPtr.Zero, sb, 512);
            Win32.CloseHandle(pHandle);

            IntPtr[] largeIcons, smallIcons ;
            int IconCount = ExtractIconEx(sb.ToString(), -1, null, null, 0);   
            largeIcons = new IntPtr[IconCount];
            smallIcons = new IntPtr[IconCount];
            ExtractIconEx(sb.ToString(), 0, largeIcons, smallIcons, IconCount);

            if (largeIcons.Length > 0)
            {
                return largeIcons[0];
            }
            else
            {
                return IntPtr.Zero;
            }
        }

        public ImageSource GetIcon()
        {
            IntPtr icon = new IntPtr(0);
            icon = getAppIconFromWindowHandle(this.taskBarWindow.hwnd);
            if (icon != IntPtr.Zero)
            {
                return System.Windows.Interop.Imaging.CreateBitmapSourceFromHIcon(
                            icon,
                            new Int32Rect(0, 0, 32, 32),
                            BitmapSizeOptions.FromEmptyOptions());
            }
            else
            {
                return null;
            }
        }


    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace WpfApplication1
{
    public class Win32
    {
        [DllImport("user32.dll", EntryPoint = "GetClassName")]
        public static extern int GetClassName(int hwnd, StringBuilder lpClassName, int nMaxCount);

        [DllImport("user32.dll", EntryPoint = "GetWindow")]
        public static extern int GetWindow(int hwnd, int uCmd);

        [DllImport("user32.dll", EntryPoint = "GetWindowLong")]
        public static extern long GetWindowLong(int hwnd, int nIndex);

        [DllImport("user32.dll", EntryPoint = "IsWindowVisible")]
        public static extern bool IsWindowVisible(int hwnd);

        [DllImport("user32.dll", EntryPoint = "SetForegroundWindow")]
        public static extern bool SetForegroundWindow(int hwnd);

        [DllImport("user32.dll", EntryPoint = "ShowWindow")]
        public static extern bool ShowWindow(int hwnd, int nCmdShow);     
        
        [DllImport("user32.dll", EntryPoint = "GetWindowText")]
        public static extern int GetWindowText(int hwnd, StringBuilder lpString, int cch);

        public delegate bool EnumWindowsProc(int hWnd, int lParam);

        [DllImport("user32.dll")]
        public static extern int EnumWindows(EnumWindowsProc ewp, int lParam);




        public const int PROCESS_ALL_ACCESS = 0x000F0000 | 0x00100000 | 0xFFF;
        [DllImport("User32.dll")]
        public extern static int GetWindowThreadProcessId(IntPtr hWnd, ref int lpdwProcessId);
        [DllImport("Kernel32.dll")]
        public extern static IntPtr OpenProcess(int fdwAccess, int fInherit, int IDProcess);
        [DllImport("Kernel32.dll")]
        public extern static bool TerminateProcess(IntPtr hProcess, int uExitCode);
        [DllImport("Kernel32.dll")]
        public extern static bool CloseHandle(IntPtr hObject);
        [DllImport("Kernel32.dll", EntryPoint = "GetModuleFileName")]
        public static extern uint GetModuleFileName(IntPtr hModule, [Out] StringBuilder lpszFileName, int nSize);
        [DllImport("SHELL32.DLL", CharSet = CharSet.Auto)]
        public static extern int ExtractIconEx(string lpszFile, int nIconIndex, IntPtr phiconLarge, IntPtr phiconSmall, int nIcons);

    }
}