C#获取控制台句柄的方法

1.创建类User32API.cs，代码如下：

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

namespace XXX
{
    class User32API
    {
        private static Hashtable processWnd = null;

public delegate bool WNDENUMPROC(IntPtr hwnd, uint lParam);

static User32API()
        {
            if (processWnd == null)
            {
                processWnd = new Hashtable();
            }
        }

[DllImport("user32.dll", EntryPoint = "EnumWindows", SetLastError = true)]
        public static extern bool EnumWindows(WNDENUMPROC lpEnumFunc, uint lParam);

[DllImport("user32.dll", EntryPoint = "GetParent", SetLastError = true)]
        public static extern IntPtr GetParent(IntPtr hWnd);

[DllImport("user32.dll", EntryPoint = "GetWindowThreadProcessId")]
        public static extern uint GetWindowThreadProcessId(IntPtr hWnd, ref uint lpdwProcessId);

[DllImport("user32.dll", EntryPoint = "IsWindow")]
        public static extern bool IsWindow(IntPtr hWnd);

[DllImport("kernel32.dll", EntryPoint = "SetLastError")]
        public static extern void SetLastError(uint dwErrCode);

public static IntPtr GetCurrentWindowHandle()
        {
            IntPtr ptrWnd = IntPtr.Zero;
            uint uiPid = (uint)System.Diagnostics.Process.GetCurrentProcess().Id;  // 当前进程 ID
            object objWnd = processWnd[uiPid];

if (objWnd != null)
            {
                ptrWnd = (IntPtr)objWnd;
                if (ptrWnd != IntPtr.Zero && IsWindow(ptrWnd))  // 从缓存中获取句柄
                {
                    return ptrWnd;
                }
                else
                {
                    ptrWnd = IntPtr.Zero;
                }
            }

bool bResult = EnumWindows(new WNDENUMPROC(EnumWindowsProc), uiPid);
            // 枚举窗口返回 false 并且没有错误号时表明获取成功
            if (!bResult && Marshal.GetLastWin32Error() == 0)
            {
                objWnd = processWnd[uiPid];
                if (objWnd != null)
                {
                    ptrWnd = (IntPtr)objWnd;
                }
            }

return ptrWnd;
        }

private static bool EnumWindowsProc(IntPtr hwnd, uint lParam)
        {
            uint uiPid = 0;

if (GetParent(hwnd) == IntPtr.Zero)
            {
                GetWindowThreadProcessId(hwnd, ref uiPid);
                if (uiPid == lParam)    // 找到进程对应的主窗口句柄
                {
                    processWnd[uiPid] = hwnd;   // 把句柄缓存起来
                    SetLastError(0);    // 设置无错误
                    return false;   // 返回 false 以终止枚举窗口
                }
            }

return true;
        }

}
}

2.调用类User32API获取控制台句柄的代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;