C# 根据坐标获取句柄

//获取窗口标题

[DllImport("user32", SetLastError = true)]

public static extern int GetWindowText(

    IntPtr hWnd,//窗口句柄

    StringBuilder lpString,//标题

    int nMaxCount //最大值

    );



//获取类的名字

[DllImport("user32.dll")]

private static extern int GetClassName(

    IntPtr hWnd,//句柄

    StringBuilder lpString, //类名

    int nMaxCount //最大值

    );



//根据坐标获取窗口句柄

[DllImport("user32")]

private static extern IntPtr WindowFromPoint(

Point Point  //坐标

);



private void timer1_Tick(object sender, EventArgs e)

{

    int x = Cursor.Position.X;

    int y = Cursor.Position.Y;

    Point p = new Point(x, y);

    IntPtr formHandle = WindowFromPoint(p);//得到窗口句柄

    StringBuilder title = new StringBuilder(256);

    GetWindowText(formHandle, title, title.Capacity);//得到窗口的标题

    StringBuilder className = new StringBuilder(256);

    GetClassName(formHandle, className, className.Capacity);//得到窗口的句柄

    this.textBox1.Text = title.ToString();

    this.textBox2.Text = formHandle.ToString();

    this.textBox3.Text = className.ToString();

}