如何从MDICLIENT组件3D边框（凹陷）的MDI父窗体？

问题描述

我正在开发中VS2010（.NET 4.0）的WinForms MDI的应用程序，我只是不愿意在MDI父窗体的3D边框。

I am developing WinForms MDI app in VS2010 (.NET 4.0) and I just hate 3D border in MDI parent form.

那么如何去除它的任何想法（使其平坦或只是没有边界这一切）？

So any ideas on how to remove it (make it flat or just no border it all) ?

推荐答案

我知道这是一个老的文章，但我花了一些时间和疼痛片段工作的3D边框的东西了（因为我需要它太）在互联网上其中包括：

I know this is an old post but I have spent some time and pain working the 3D border stuff out (because I needed it too) from fragments across the internet including:

<一个href="http://www.$c$cproject.com/Articles/8489/Getting-a-quot-Handle-quot-on-the-MDI-Client#Changing%20the%20Border%20Styles">Elements雅各Slusser的页面在codeproject.com（访问的第一Aug'12）

所以这里有云：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace MDITest
{
    public static class MDIClientSupport
    {
        [DllImport("user32.dll")]
        private static extern int GetWindowLong(IntPtr hWnd, int nIndex);

        [DllImport("user32.dll")]
        private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);

        [DllImport("user32.dll", ExactSpelling = true)]
        private static extern int SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);

        private const int GWL_EXSTYLE = -20;
        private const int WS_EX_CLIENTEDGE = 0x200;
        private const uint SWP_NOSIZE = 0x0001;
        private const uint SWP_NOMOVE = 0x0002;
        private const uint SWP_NOZORDER = 0x0004;
        private const uint SWP_NOREDRAW = 0x0008;
        private const uint SWP_NOACTIVATE = 0x0010;
        private const uint SWP_FRAMECHANGED = 0x0020;
        private const uint SWP_SHOWWINDOW = 0x0040;
        private const uint SWP_HIDEWINDOW = 0x0080;
        private const uint SWP_NOCOPYBITS = 0x0100;
        private const uint SWP_NOOWNERZORDER = 0x0200;
        private const uint SWP_NOSENDCHANGING = 0x0400;

        public static bool SetBevel(this Form form, bool show)
        {
            foreach (Control c in form.Controls)
            {
                MdiClient client = c as MdiClient;
                if (client != null)
                {
                    int windowLong = GetWindowLong(c.Handle, GWL_EXSTYLE);

                    if (show)
                    {
                        windowLong |= WS_EX_CLIENTEDGE;
                    }
                    else
                    {
                        windowLong &= ~WS_EX_CLIENTEDGE;
                    }

                    SetWindowLong(c.Handle, GWL_EXSTYLE, windowLong);

                    // Update the non-client area.
                    SetWindowPos(client.Handle, IntPtr.Zero, 0, 0, 0, 0,
                        SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
                        SWP_NOOWNERZORDER | SWP_FRAMECHANGED);

                    return true;
                }
            }
            return false;
        }

    }
}

在窗体的Load事件中调用：

In the form load event call:

form.SetBevel(false);

不要忘记更改命名空间和记住这是一个扩展方法，但它可以被更改的情况下仅仅指刚一个方法调用另一个类或你MDI父窗体。

Don't forget to change the namespace and remember this is an extension method but it could be changed to be jsut a method call in another class or in you MDI parent form.

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