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我想在我的 c# winform 应用程序中检测标题栏上的鼠标悬停或标题栏上的鼠标移出。我得到了一个有效的代码，但问题是当我将鼠标放在 win 表单的任何区域然后鼠标离开发生并且当我将鼠标放在标题栏上然后右事件调用时。这是代码

using System.Runtime.InteropServices;
public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        protected override void WndProc(ref Message m)
        {
            if (m.Msg == 0xA0) // WM_NCMOUSEMOVE
            {
                TrackNcMouseLeave(this);
                //ShowClientArea();
                label1.Text = "mouse move on title bar";
            }
            else if (m.Msg == 0x2A2) // WM_NCMOUSELEAVE
            {
                //HideClientAreaIfPointerIsOut();
                label1.Text = "mouse leave from title bar";
            }

            base.WndProc(ref m);
        }

        protected override void OnMouseLeave(EventArgs e)
        {
            base.OnMouseLeave(e);
            //HideClientAreaIfPointerIsOut();
        }

        private int previouseHeight;

        private void ShowClientArea()
        {
            if (this.ClientSize.Height == 0)
                this.ClientSize = new Size(this.ClientSize.Width, previouseHeight);
        }

        private void HideClientAreaIfPointerIsOut()
        {
            if (this.Bounds.Contains(Cursor.Position))
                return;
            previouseHeight = this.ClientSize.Height;
            this.ClientSize = new Size(this.ClientSize.Width, 0);
        }

        public static void TrackNcMouseLeave(Control control)
        {
            TRACKMOUSEEVENT tme = new TRACKMOUSEEVENT();
            tme.cbSize = (uint)Marshal.SizeOf(tme);
            tme.dwFlags = 2 | 0x10; // TME_LEAVE | TME_NONCLIENT
            tme.hwndTrack = control.Handle;
            TrackMouseEvent(tme);
        }

        [DllImport("user32")]
        public static extern bool TrackMouseEvent([In, Out] TRACKMOUSEEVENT lpEventTrack);

        [StructLayout(LayoutKind.Sequential)]
        public class TRACKMOUSEEVENT
        {
            public uint cbSize;
            public uint dwFlags;
            public IntPtr hwndTrack;
            public uint dwHoverTime;
        }
    }

所以有人请指导我当我将鼠标放在身体上时我需要改变什么，那么我不应该被通知。谢谢

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