DllImport("kernel32.dll")]bool Beep(int frequency, int duration);

最新推荐文章于 2022-10-28 22:55:58 发布

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最新推荐文章于 2022-10-28 22:55:58 发布

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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.Windows.Forms;

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

        [System.Runtime.InteropServices.DllImport("kernel32.dll")]
        public static extern bool Beep(int frequency, int duration);

        private void button1_Click(object sender, EventArgs e)
        {
            Beep(1000, 20);
        }
    }
}