آموزش برنامه نویسی

غیرفعال کردن دکمه Close فرم

using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private const int SC_CLOSE = 0xF060;
        private const int MF_GRAYED = 0x1;
        [DllImport("user32.dll")]
        private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
        [DllImport("user32.dll")]
        private static extern int EnableMenuItem(IntPtr hMenu, int wIDEnableItem, int wEnable);


        private void Form1_Load(object sender, EventArgs e)
        {
            EnableMenuItem(GetSystemMenu(this.Handle, false), SC_CLOSE, MF_GRAYED);
        }

    }
}

نتیجه

منبع : barnamenevis.org