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   源码介绍

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Rose : Form
    {
        public Rose()
        {
            InitializeComponent();
        }

        protected override void WndProc(ref Message m)
        {
            const int WM_NCHITTEST = 0x84;
            const int HTCLIENT = 0x01;
            const int HTCAPTION = 0x02;
            if (m.Msg == WM_NCHITTEST)
            {
                this.DefWndProc(ref m);
                if (m.Result.ToInt32() == HTCLIENT)
                    m.Result = new IntPtr(HTCAPTION);
                else
                    base.WndProc(ref m);
            }
            else
            {
                base.WndProc(ref m);
            }
        }

        private void Rose_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == (char)Keys.Escape)
            {
                this.Close();
            }
        }
    }
}