指定 MessageBox Show 的位置

jackyzhangyb 2009-05-12 01:29:15

想指定它出现的位置和窗体的位置一致，请问如何实现。

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江南野鹤 2012-05-10

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我也试了一下,也不行!

grlsir 2011-12-14

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这个。。。我试了一下好像不行啊。。。

jackyzhangyb 2009-05-13

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牛B啊！

「已注销」 2009-05-12

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using System;

using System.Collections.Generic;

using System.Text;

using System.Runtime.InteropServices;

using System.Windows.Forms;

using System.Drawing;



namespace Updater

{

    struct RECT { 

     public int left;

     public int top;

     public int right;

     public int bottom;

    };

    //实现MessageBox居中owner窗体显示

    class MessageBoxEx

    {

        public delegate IntPtr HookProc(int nCode, IntPtr wParam, IntPtr lParam);



        [DllImport("user32.dll")]

        private static extern IntPtr SetWindowsHookEx(int hookid,

            HookProc pfnhook, IntPtr hinst, int threadid);



        [DllImport("user32.dll")]

        private static extern IntPtr CallNextHookEx(IntPtr hhook,

            int code, IntPtr wparam, IntPtr lparam);



        [DllImport("kernel32.dll")]

        private static extern IntPtr GetModuleHandle(string modName);



        [DllImport("user32.dll")]

        private static extern bool UnhookWindowsHookEx(IntPtr hhook);



        [DllImport("user32.dll")]

        private static extern bool GetWindowRect(IntPtr hWnd, ref RECT rect);



        [DllImport("user32.dll")]

        private static extern IntPtr GetWindow(IntPtr hWnd, uint uCmd);



        [DllImport("user32.dll")]

        private static extern bool MoveWindow(

            IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);



        private const int WH_CBT = 5;

        private const int HCBT_ACTIVATE = 5;

        private const int GW_OWNER = 4;

        private static IntPtr hookHandle = IntPtr.Zero;



        private static RECT GetOwnerRect(IntPtr hwnd)

        {

            RECT ownerRect = new RECT();

            IntPtr ownerHwnd = GetWindow(hwnd, GW_OWNER);

            GetWindowRect(ownerHwnd, ref ownerRect);

            return ownerRect;

        }



        private static IntPtr CBTHookCallback(int nCode, IntPtr wParam, IntPtr lParam)

        {

            switch (nCode)

            {

                case HCBT_ACTIVATE:

                    RECT vRectangle = new RECT();

                    RECT ownerRect = GetOwnerRect(wParam);

                    GetWindowRect(wParam, ref vRectangle);

                    int width = vRectangle.right - vRectangle.left;

                    int height = vRectangle.bottom - vRectangle.top;

                    int ownerWidth = ownerRect.right - ownerRect.left;

                    int ownerHeight = ownerRect.bottom - ownerRect.top;

                    int left = Math.Max(ownerRect.left + (ownerWidth - width) / 2, 0);

                    int top = Math.Max(ownerRect.top + (ownerHeight - height) / 2, 0);

                    MoveWindow(wParam,

                        left,

                        top,

                        width, height, false);

                    UnhookWindowsHookEx(hookHandle);

                    break;

            }

            return CallNextHookEx(hookHandle, nCode, wParam, lParam);

        }



        private static void Lock()

        {

            hookHandle = SetWindowsHookEx(WH_CBT, new HookProc(CBTHookCallback),

                GetModuleHandle(null), 0);

        }

        //根据需要重载

        public static DialogResult Show(string text)

        {

            Lock();

            return MessageBox.Show(text);

        }

        public static DialogResult Show(IWin32Window owner, string text)

        {

            Lock();

            return MessageBox.Show(owner, text);

        }

        public static DialogResult Show(string text, string caption)

        {

            Lock();

            return MessageBox.Show(text, caption);

        }

        public static DialogResult Show(IWin32Window owner, string text, string caption)

        {

            Lock();

            return MessageBox.Show(owner, text, caption);

        }

        public static DialogResult Show(string text, string caption, MessageBoxButtons buttons)

        {

            Lock();

            return MessageBox.Show(text, caption, buttons);

        }

        public static DialogResult Show(IWin32Window owner, string text, string caption, MessageBoxButtons buttons)

        {

            Lock();

            return MessageBox.Show(owner, text, caption, buttons);

        }

        public static DialogResult Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon)

        {

            Lock();

            return MessageBox.Show(text, caption, buttons, icon);

        }

        public static DialogResult Show(IWin32Window owner, string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon)

        {

            Lock();

            return MessageBox.Show(owner, text, caption, buttons, icon);

        }

        public static DialogResult Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton)

        {

            Lock();

            return MessageBox.Show(text, caption, buttons, icon, defaultButton);

        }







    }

}