关于Winform中Disabled“X”按钮的问题

[rqx110]

今天在CodeProject上看到一篇文章关于Winform中Disabled掉“X”按钮的文章，以前在网上所能找到的解决方法都是使用API来实现，在此文章中看到一种.net方式实现的方法，特共享一下：
API方法：
1. Add this using Statement in the header :

using System.Runtime.InteropServices;

2. In the class add :

private const int MF_BYPOSITION = 0x400;
[DllImport("User32")]
private static extern int RemoveMenu(IntPtr hMenu, int nPosition, int wFlags);
[DllImport("User32")]
private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
[DllImport("User32")]
private static extern int GetMenuItemCount(IntPtr hWnd);

3. Finally to disable the close button during runtime Use :

IntPtr hMenu = GetSystemMenu(this.Handle, false);
int menuItemCount = GetMenuItemCount(hMenu);
RemoveMenu(hMenu, menuItemCount - 1, MF_BYPOSITION);

C#实现：

#region "Disable the 'X'"
protected override CreateParams CreateParams
{
    get {
        CreateParams cp = base.CreateParams;
        const int CS_NOCLOSE = 0x200;
        cp.ClassStyle = cp.ClassStyle | CS_NOCLOSE;
        return cp;
    }
}
#endregion

VB.NET实现：

#Region "Disable the 'X'"    
Protected Overrides ReadOnly Property CreateParams() As CreateParams
        Get
            Dim cp As CreateParams = MyBase.CreateParams
            Const CS_NOCLOSE As Integer = &H200
            cp.ClassStyle = cp.ClassStyle Or CS_NOCLOSE
            Return cp
        End Get
    End Property
#End Region

原文地址：http://www.codeproject.com/tips/46722/Disable-Close-Button-from-Title-bar-of-a-Window.aspx

[gc_lys]

怎么Disable掉网页模态窗口的X 貌似怎么都不好使

[云水千寻]

帮顶啦

[outou]

但LZ的方法可象不能适用于ALT + F4的方法。下面是X和ALT + F4不能使用的方法。代码来自http://bingning.net/free/source/form/disabledclosebutton.html

[VB.NET]

 Protected Overrides Sub WndProc( _
         ByRef m As System.Windows.Forms.Message)
     Const WM_SYSCOMMAND As Integer = &H112
     Const SC_CLOSE As Integer = &HF060
 
     If m.Msg = WM_SYSCOMMAND And m.WParam.ToInt32() = SC_CLOSE Then
         Return
     End If
 
     MyBase.WndProc(m)
 End Sub

[C#]

 protected override void WndProc(ref Message m)
 {
     const int WM_SYSCOMMAND = 0x112;
     const int SC_CLOSE = 0xF060;
 
     if (m.Msg == WM_SYSCOMMAND && m.WParam.ToInt32() == SC_CLOSE)
     {
         return;
     }
 
     base.WndProc (ref m);
 }

[rqx110]

#region "Disable the 'X'"
protected override CreateParams CreateParams
{
    get {
        CreateParams cp = base.CreateParams;
        const int CS_NOCLOSE = 0x200;
        cp.ClassStyle = cp.ClassStyle | CS_NOCLOSE;
        return cp;
    }
}
#endregion

使用这个 ALT+F4无效啊！