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; using System.Runtime.InteropServices; namespace WindowsFormsApp1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } [DllImport("detector.dll", EntryPoint = "Loadmodel", CharSet = CharSet.Ansi)] public static extern void test(); private void button1_Click(object sender, EventArgs e) { test(); } } }