C#完善上述虚拟键盘功能的代码

以下是一个示例代码，实现了在C#中使用Windows API模拟按键和鼠标事件：

using System;
using System.Runtime.InteropServices;

public class VirtualKeyboard
{
    private const int KEYEVENTF_EXTENDEDKEY = 0x1;
    private const int KEYEVENTF_KEYUP = 0x2;
    private const int VK_SHIFT = 0x10;
    private const int VK_CONTROL = 0x11;
    private const int VK_MENU = 0x12;
    private const int VK_LWIN = 0x5B;
    private const int VK_RWIN = 0x5C;

    [DllImport("user32.dll")]
    private static extern void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo);

    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);

    [DllImport("user32.dll")]
    private static extern bool SetCursorPos(int x, int y);

    [DllImport("user32.dll")]
    private static extern void mouse_event(int dwFlags, int dx, int dy, int dwData, int dwExtraInfo);

    private static void PressKey(byte keyCode)
    {
        keybd_event(keyCode, 0, 0, 0);
    }

    private static void ReleaseKey(byte keyCode)
    {
        keybd_event(keyCode, 0, KEYEVENTF_KEYUP, 0);
    }

    public static void Type(string text)
    {
        foreach (char c in text)
        {
            byte keyCode = (byte)Char.ToUpper(c);

            if (Char.IsLetterOrDigit(c))
            {
                PressKey(keyCode);
                ReleaseKey(keyCode);
            }
            else
            {
                switch (c)
                {
                    case ' ':
                        PressKey(0x20);
                        ReleaseKey(0x20);
                        break;
                    case '\n':
                        PressKey(0x0D);
                        ReleaseKey(0x0D);
                        break;
                    case '\t':
                        PressKey(0x09);
                        ReleaseKey(0x09);
                        break;
                    case '+':
                        PressKey(VK_SHIFT);
                        PressKey(0xBB);
                        ReleaseKey(0xBB);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '^':
                        PressKey(VK_CONTROL);
                        PressKey(keyCode);
                        ReleaseKey(keyCode);
                        ReleaseKey(VK_CONTROL);
                        break;
                    case '%':
                        PressKey(VK_MENU);
                        PressKey(keyCode);
                        ReleaseKey(keyCode);
                        ReleaseKey(VK_MENU);
                        break;
                    case '{':
                        PressKey(VK_SHIFT);
                        PressKey(0xDB);
                        ReleaseKey(0xDB);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '}':
                        PressKey(VK_SHIFT);
                        PressKey(0xDD);
                        ReleaseKey(0xDD);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '(':
                        PressKey(VK_SHIFT);
                        PressKey(0x39);
                        ReleaseKey(0x39);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case ')':
                        PressKey(VK_SHIFT);
                        PressKey(0x30);
                        ReleaseKey(0x30);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '~':
                        PressKey(VK_SHIFT);
                        PressKey(0xC0);
                        ReleaseKey(0xC0);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '!':
                        PressKey(VK_SHIFT);
                        PressKey(0x31);
                        ReleaseKey(0x31);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '@':
                        PressKey(VK_SHIFT);
                        PressKey(0x32);
                        ReleaseKey(0x32);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '#':
                        PressKey(VK_SHIFT);
                        PressKey(0x33);
                        ReleaseKey(0x33);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '$':
                        PressKey(VK_SHIFT);
                        PressKey(0x34);
                        ReleaseKey(0x34);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '%':
                        PressKey(VK_SHIFT);
                        PressKey(0x35);
                        ReleaseKey(0x35);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '^':
                        PressKey(VK_SHIFT);
                        PressKey(0x36);
                        ReleaseKey(0x36);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '&':
                        PressKey(VK_SHIFT);
                        PressKey(0x37);
                        ReleaseKey(0x37);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '*':
                        PressKey(VK_SHIFT);
                        PressKey(0x38);
                        ReleaseKey(0x38);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '_':
                        PressKey(VK_SHIFT);
                        PressKey(0xBD);
                        ReleaseKey(0xBD);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '+':
                        PressKey(VK_SHIFT);
                        PressKey(0xBB);
                        ReleaseKey(0xBB);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '|':
                        PressKey(VK_SHIFT);
                        PressKey(0xDC);
                        ReleaseKey(0xDC);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case ':':
                        PressKey(VK_SHIFT);
                        PressKey(0xBA);
                        ReleaseKey(0xBA);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '\"':
                        PressKey(VK_SHIFT);
                        PressKey(0xDE);
                        ReleaseKey(0xDE);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '<':
                        PressKey(VK_SHIFT);
                        PressKey(0xBC);
                        ReleaseKey(0xBC);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '>':
                        PressKey(VK_SHIFT);
                        PressKey(0xBE);
                        ReleaseKey(0xBE);
                        ReleaseKey(VK_SHIFT);
                        break;
                    case '?':
                        PressKey(VK_SHIFT);
                        PressKey(0xBF);
                        ReleaseKey(0xBF);
                        ReleaseKey(VK_SHIFT);
                        break;
                    default:
                        break;
                }
            }
        }
    }

    public static void Click(int x, int y)
    {
        SetCursorPos(x, y);
        mouse_event(0x2, x, y, 0, 0);
        mouse_event(0x4, x, y, 0, 0);
    }

    public static void RightClick(int x, int y)
    {
        SetCursorPos(x, y);
        mouse_event(0x8, x, y, 0, 0);
        mouse_event(0x10, x, y, 0, 0);
    }

    public static void DoubleClick(int x, int y)
    {
        SetCursorPos(x, y);
        mouse_event(0x2, x, y, 0, 0);
        mouse_event(0x4, x, y, 0, 0);
        mouse_event(0x2, x, y, 0, 0);
        mouse_event(0x4, x, y, 0, 0);
    }

    public static void Scroll(int delta)
    {
        SendMessage(IntPtr.Zero, 0x20a, IntPtr.Zero, new IntPtr(delta * 120));
    }

    public static void PressWinKey()
    {
        PressKey(VK_LWIN);
        ReleaseKey(VK_LWIN);
    }

    public static void PressCtrlAltDel()
    {
        PressKey(VK_CONTROL);
        PressKey(VK_MENU);
        PressKey(0x2E);
        ReleaseKey(0x2E);
        ReleaseKey(VK_CONTROL);
        ReleaseKey(VK_MENU);
    }
}

该类包含了模拟按键和鼠标事件的方法，其中Type方法可以接收一个字符串并模拟在键盘上键入该字符串，支持特殊字符和组合键。Click、RightClick和DoubleClick方法可以模拟鼠标左键、右键和双击事件，Scroll方法可以模拟鼠标滚轮事件，PressWinKey方法可以模拟按下Windows键，PressCtrlAltDel方法可以模拟Ctrl+Alt+Del组合键。