在winform上内嵌入其它的程序

这段代码很有意义,用于把一个程序的界面嵌入到我们自己程序的某个指定窗体上.

比如在某个项目里,我需要把基恩士的激光扫描轮廓显示给客户看,但是激光的DLL中并没有这种功能提供. 于是我想先启动激光的官方程序用以显示轮廓, 然后再把这种显示界面嵌入到我自己程序的界面上指定的位置上.

在笔者构想的PLC仿真器由梯形图编辑器, 3D仿真组态环境两部分组成, 这两部分就可以考虑开发成独立的软件,然后嵌入到我需要的另外的一款PLC仿真教学软件中去.

源代码如下:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Threading;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        Process p;

        public Form1()
        {
            InitializeComponent();
        }

        #region API
        [DllImport("user32.dll")]
        private static extern int SetParent(IntPtr hWndChild, IntPtr hWndParent);

        [DllImport("user32.dll")]
        private static extern bool ShowWindowAsync(IntPtr hWnd, int nCmdShow);

        [DllImport("user32.dll", SetLastError = true)]
        private static extern bool PostMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);

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

        [DllImport("user32.dll")]
        private static extern int SendMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);

        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern uint SetWindowLong(IntPtr hwnd, int nIndex, uint newLong);

        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern uint GetWindowLong(IntPtr hwnd, int nIndex);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        private static extern bool ShowWindow(IntPtr hWnd, short State);

        private const int HWND_TOP = 0x0;
        private const int WM_COMMAND = 0x0112;
        private const int WM_QT_PAINT = 0xC2DC;
        private const int WM_PAINT = 0x000F;
        private const int WM_SIZE = 0x0005;
        private const int SWP_FRAMECHANGED = 0x0020;
        public enum ShowWindowStyles : short
        {
            SW_HIDE = 0,
            SW_SHOWNORMAL = 1,
            SW_NORMAL = 1,
            SW_SHOWMINIMIZED = 2,
            SW_SHOWMAXIMIZED = 3,
            SW_MAXIMIZE = 3,
            SW_SHOWNOACTIVATE = 4,
            SW_SHOW = 5,
            SW_MINIMIZE = 6,
            SW_SHOWMINNOACTIVE = 7,
            SW_SHOWNA = 8,
            SW_RESTORE = 9,
            SW_SHOWDEFAULT = 10,
            SW_FORCEMINIMIZE = 11,
            SW_MAX = 11
        }
        #endregion

        private void Form1_Load(object sender, EventArgs e)
        {
            p = new Process();
            //需要启动的程序
            p.StartInfo.FileName = @"calc.exe";
            //为了美观,启动的时候最小化程序
            p.StartInfo.WindowStyle = ProcessWindowStyle.Minimized;
            //启动
            p.Start();

            //这里必须等待,否则启动程序的句柄还没有创建,不能控制程序
            Thread.Sleep(10000);
            //最大化启动的程序
            ShowWindow(p.MainWindowHandle, (short)ShowWindowStyles.SW_MAXIMIZE);
            //设置被绑架程序的父窗口
            SetParent(p.MainWindowHandle, this.Handle);
            //改变尺寸
            ResizeControl();
        }

        //控制嵌入程序的位置和尺寸
        private void ResizeControl()
        {
            SendMessage(p.MainWindowHandle, WM_COMMAND, WM_PAINT, 0);
            PostMessage(p.MainWindowHandle, WM_QT_PAINT, 0, 0);

            SetWindowPos(
            p.MainWindowHandle,
              HWND_TOP,
              0 - 10,//设置偏移量,把原来窗口的菜单遮住
               0 - 32,
              (int)this.Width + 32,
              (int)this.Height + 32,
              SWP_FRAMECHANGED);

            SendMessage(p.MainWindowHandle, WM_COMMAND, WM_SIZE, 0);
        }

        private void Form1_SizeChanged(object sender, EventArgs e)
        {
            ResizeControl();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            p.Kill();
            p.Dispose();
        }
    }
}

核心功能利用了windows API中的SetParent()

程序运行后, 先启动calc.exe(windows计算器), 然后等待10秒后再显示本程序自己的窗体, 这时你会发现这个窗体已经把calc.exe的界面包含进来的.

这样你就可以清楚的看到嵌入的效果是怎么样的.

效果如上图所示. 但是你的程序在退出前,要自己"杀掉"计算器的进程, 否则你的程序退出它还在.

本文源代码

  原创文章,出处 : http://www.cnblogs.com/hackpig/