C#无边框窗体的移动

最新推荐文章于 2025-12-30 09:43:34 发布

转载最新推荐文章于 2025-12-30 09:43:34 发布 · 681 阅读

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#c# #object #button #user #class

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本文介绍了一个简单的C# Windows应用程序示例，演示如何实现窗体的鼠标拖动功能及关闭按钮的功能。通过调用.NET Framework提供的P/Invoke服务，该示例使用了user32.dll中的API函数ReleaseCapture()和SendMessage()来完成拖动操作，并实现了窗体的正常关闭。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public const int WM_NCLBUTTONDOWN = 0xA1;
        public const int HTCAPTION = 0x2;

        [DllImportAttribute("user32.dll")]
        public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);

        [DllImportAttribute("user32.dll")]
        public static extern bool ReleaseCapture();

        private void button1_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            ReleaseCapture();
            SendMessage(Handle, WM_NCLBUTTONDOWN, HTCAPTION, 0);
        }
    }
}