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 = ,
             SW_SHOWNORMAL = ,
             SW_NORMAL = ,
             SW_SHOWMINIMIZED = ,
             SW_SHOWMAXIMIZED = ,
             SW_MAXIMIZE = ,
             SW_SHOWNOACTIVATE = ,
             SW_SHOW = ,
             SW_MINIMIZE = ,
             SW_SHOWMINNOACTIVE = ,
             SW_SHOWNA = ,
             SW_RESTORE = ,
             SW_SHOWDEFAULT = ,
             SW_FORCEMINIMIZE = ,
             SW_MAX =
         }
         #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();
             //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, );
             PostMessage(p.MainWindowHandle, WM_QT_PAINT, , );

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

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

         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/