禁用和启用windows form窗体上的关闭按钮

 1public partial class Form1 : Form
 2    {
 3        private bool isEnableCloseButton = false;
 4        public Form1(string strFlag)
 5        {
 6            InitializeComponent();
 7            if (strFlag == "no")
 8            {
 9                this.lbl_CloseButtonIsEnabled.Text = "窗体右上角关闭按钮无效";
10                this.isEnableCloseButton = false;
11            }
12            else
13            {
14                this.lbl_CloseButtonIsEnabled.Text = "可以通过窗体右上角关闭按钮 关闭窗体";
15                this.isEnableCloseButton = true;
16            }
17        }
18
19        protected override CreateParams CreateParams
20        {
21            get
22            {
23                if (isEnableCloseButton)
24                {
25                    CreateParams parameters = base.CreateParams;
26                    return parameters;
27                }
28                else
29                {
30      int CS_NOCLOSE = 0x200;
31                    CreateParams parameters = base.CreateParams;
32                    parameters.ClassStyle |= CS_NOCLOSE;
33                    return parameters;                    
34                }
35            }
36        }
37}
38

转载于:https://www.cnblogs.com/djbone/archive/2008/08/12/1266344.html