去掉/禁止系统菜单里的MOVE的方法

针对论坛上的问题“如何禁止在标题栏上点右键”，有如下方法：

1。用API去掉Move，

[DllImport(“user32.dll”,EntryPoint=”GetSystemMenu”)]
extern static System.IntPtr GetSystemMenu(System.IntPtr hWnd , System.IntPtr
bRevert);

[DllImport(“user32.dll”,EntryPoint=”RemoveMenu”)]
extern static int RemoveMenu (IntPtr hMenu, int nPos, int flags);

static int MF_BYPOSITION = 0x400;
static int MF_REMOVE = 0x1000;

System.IntPtr hdl= GetSystemMenu(this.Handle,System.IntPtr.Zero);
int nflag =MF_BYPOSITION | MF_REMOVE;
int npos =1;
RemoveMenu(hdl,npos,nflag);

2。去掉系统菜单(不推荐)

private const int WS_SYSMENU = 0x00080000;

protected override CreateParams CreateParams
  {
   get
   {
    CreateParams cp =  base.CreateParams;
    cp.Style = cp.Style & ~WS_SYSMENU;
    return cp;
   }
}

示范代码如下

using System;<br /> using System.Windows.Forms;<br /> using System.Runtime.InteropServices;</p> <p>public class Test : Form<br /> {</p> <pre><code>[DllImport("user32.dll",EntryPoint="GetSystemMenu")] extern static System.IntPtr GetSystemMenu(System.IntPtr hWnd , System.IntPtr bRevert); [DllImport("user32.dll",EntryPoint="RemoveMenu")] extern static int RemoveMenu (IntPtr hMenu, int nPos, int flags); static int MF_BYPOSITION = 0x400; static int MF_REMOVE = 0x1000; </code></pre> <p>Test()<br /> {<br /> Text = “不让拖动的标题栏”;<br /> FormBorderStyle = FormBorderStyle.FixedDialog;<br /> MaximizeBox = false;<br /> MinimizeBox = false;</p> <pre><code>//method 1 /*System.IntPtr hdl= GetSystemMenu(this.Handle,System.IntPtr.Zero); int nflag =MF_BYPOSITION | MF_REMOVE; int npos =1; RemoveMenu(hdl,npos,nflag); */ </code></pre> <p>}</p> <p>private const int WM_NCHITTEST = 0x84;<br /> private const int HTCAPTION = 0x2;<br /> private const int HTCLIENT = 0x1;</p> <p>protected override void WndProc(ref Message m)<br /> {<br /> base.WndProc(ref m);<br /> if(m.Msg == WM_NCHITTEST && m.Result == (IntPtr)HTCAPTION)<br /> {<br /> m.Result = (IntPtr) HTCLIENT;<br /> }<br /> }</p> <p>//method 2</p> <pre><code>private const int WS_SYSMENU = 0x00080000; protected override CreateParams CreateParams { get { CreateParams cp = base.CreateParams; cp.Style = cp.Style &amp; ~WS_SYSMENU; return cp; } } </code></pre> <p>static void Main()<br /> {<br /> Application.Run(new Test());<br /> }<br /> }</p> <p>