去掉/禁止系统菜单里的MOVE方法-优快云博客

本文链接：https://blog.youkuaiyun.com/cctaiyang/article/details/563659

博客介绍了使用API去掉系统菜单中Move功能的方法，给出了相关代码示例，包括使用DllImport调用user32.dll中的函数，以及通过修改CreateParams的Style属性去掉系统菜单。还给出了完整的示范代码，展示如何实现不让拖动标题栏等功能。

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

public class Test : Form
{

[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;

   Test()
   {
       Text                        = "不让拖动的标题栏";
       FormBorderStyle = FormBorderStyle.FixedDialog;
       MaximizeBox          = false;
       MinimizeBox          = false;

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

private const int WM_NCHITTEST = 0x84;
private const int HTCAPTION = 0x2;
private const int HTCLIENT = 0x1;

   protected override void WndProc(ref Message m)
   {
       base.WndProc(ref m);
       if(m.Msg ==   WM_NCHITTEST && m.Result == (IntPtr)HTCAPTION)
       {
           m.Result = (IntPtr) HTCLIENT;
       }
   }

//method 2

private const int WS_SYSMENU = 0x00080000;

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

   static void Main()
   {
       Application.Run(new Test());
   }
}