C# 模拟鼠标输入

问：

我正在开发一个应用程序，通过模拟鼠标输入来帮助残疾人与 PC 交互。

我已经取得了一些进展，但我在鼠标左拖动方面遇到了挑战。我希望应用程序在选择“鼠标左拖动”选项 2 秒后模拟鼠标左拖动，并在鼠标停止移动 2 秒后停止拖动。以下是我正在使用的一些代码：

  public partial class frmClicker : Form
  {
    [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
    public static extern void mouse_event(uint dwFlags, uint dx, uint dy, uint cButtons, uint dwExtraInfo);
    //Mouse actions
    private const int MOUSEEVENTF_LEFTDOWN = 0x02;
    private const int MOUSEEVENTF_LEFTUP = 0x04;
    private const int MOUSEEVENTF_RIGHTDOWN = 0x08;
    private const int MOUSEEVENTF_RIGHTUP = 0x10;
    private const int MOUSEEVENTF_MIDDLEDOWN = 0x20;
    private const int MOUSEEVENTF_MIDDLEUP = 0x40;
    private const int MOUSEEVENTF_MOVE = 0x01;
    private const int MOUSEEVENTF_WHEEL = 0x0800;

    public frmClicker()
    {
    ``InitializeComponent();
    }

    public void DoMouseLeftClick()
    {
      Thread.Sleep(defaultDelay);
      uint X = (uint)Cursor.Position.X;
      uint Y = (uint)Cursor.Position.Y;
      Thread.Sleep(defaultDelay);
      mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, X, Y, 0, 0);
    }

    public void DoMouseLeftDoubleClick()
    {
      Thread.Sleep(defaultDelay);
      uint X = (uint)Cursor.Position.X;
      uint Y = (uint)Cursor.Position.Y;
      Thread.Sleep(defaultDelay);
      mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, X, Y, 0, 0);
      Thread.Sleep(50);
      mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, X, Y, 0, 0);
    }

    public void DoMouseLeftDrag()
    {
      Thread.Sleep(defaultDelay);
      uint X = (uint)Cursor.Position.X;
      uint Y = (uint)Cursor.Position.Y;
      Thread.Sleep(defaultDelay);
      mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTDOWN, X, Y, 0, 0);
      Thread.Sleep(dragRelease);
      mouse_event(MOUSEEVENTF_LEFTUP, X, Y, 0, 0);
    }

    public void DoMouseRightClick()
    {
      Thread.Sleep(defaultDelay);
      uint X = (uint)Cursor.Position.X;
      uint Y = (uint)Cursor.Position.Y;
      Thread.Sleep(defaultDelay);
      mouse_event(MOUSEEVENTF_RIGHTDOWN | MOUSEEVENTF_RIGHTUP, X, Y, 0, 0);
    }

    public void DoMouseRightDoubleClick()
    {
      Thread.Sleep(defaultDelay);
      uint X = (uint)Cursor.Position.X;
      uint Y = (uint)Cursor.Position.Y;
      Thread.Sleep(defaultDelay);
      mouse_event(MOUSEEVENTF_RIGHTDOWN | MOUSEEVENTF_RIGHTUP, X, Y, 0, 0);
      Thread.Sleep(50);
      mouse_event(MOUSEEVENTF_RIGHTDOWN | MOUSEEVENTF_RIGHTUP, X, Y, 0, 0);
    }  
  }