==<box>==========
程式1 WinObject.cs
using System;
using System.Collections;
using System.Runtime.InteropServices;
using System.Text;
using System.Drawing;
using System.Windows.Forms;

namespace MyApp
{
	// 模擬API中的rect類別，.NET中的Rectangle不能直接套用
	public struct Rect
	{
		public int left;
		public int top;
		public int right;
		public int bottom;
		public int Width
		{
			get	{ return right - left; }
		}

		public int Height
		{
			get	{ return bottom - top; }
		}
	}

	//將Windows API中視窗相關功能封裝為物件，非Thread-Safe!
	public class WinObject
	{
		IntPtr hWnd; //Window Handle

		public WinObject(IntPtr hWnd)
		{
			this.hWnd = hWnd;
		}

		//傳回Window Handle，此為建立物件時隨機產生的唯一代號
		public IntPtr Handle
		{
			get { return hWnd; }
		}

		//傳回Class Name，類別名稱
		public string ClassName 
		{
			get 
			{
				StringBuilder sb=new StringBuilder(128);
				GetClassName((int) hWnd,sb,sb.Capacity);
				return sb.ToString();
			}
		}

		//傳回Rect以取得座標、大小等相關資訊
		public Rect Rectangle 
		{
			get 
			{
				//取得座標位置
				Rect rect=new Rect();
				GetWindowRect(hWnd, ref rect);
				return rect;
			}
		}

		// 將目前的視窗物件帶為前景程式, 並取得焦點
		public void BringWindowToTop()
		{
			if (IsIconic(hWnd)) //最小化時, 先還原
			{
				int SW_RESTORE = 9;
				ShowWindow(hWnd,SW_RESTORE);
			}
			BringWindowToTop(hWnd);
		}

		//以類別名稱與視窗標題查詢所屬次一層的視窗物件
		public WinObject FindChild(string className, string windowName)
		{
			return new WinObject(
				FindWindowEx(hWnd, IntPtr.Zero, className, windowName));
		}

		//以類別名稱與視窗標題查詢直屬桌面的視窗物件
		public static WinObject FindWindow(string className, string windowName)
		{
			return new WinObject(FindWindowWin32(className, windowName));
		}

		// 傳送一個訊息給這個視窗物件
		public long SendMessage(uint Msg, uint wParam, uint lParam)
		{
			return SendMessage(hWnd, Msg, wParam, lParam);
		}

		// 傳送一個訊息給這個視窗物件, 第二個參數為字串(只傳入不回傳值)
		public long SendMessage(uint Msg, uint wParam, string lParam)
		{
			return SendMessage(hWnd, Msg, wParam, lParam);
		}

		//傳回所屬的執行緒ID
		public uint ThreadId
		{
			get
			{
				uint dwProcessId=0;
				return GetWindowThreadProcessId(hWnd, ref dwProcessId);
			}
		}

		//傳回所屬的程序ID
		public uint ProcessId
		{
			get 
			{
				uint dwProcessId=0;
				GetWindowThreadProcessId(hWnd, ref dwProcessId);
				return dwProcessId;
			}
		}

		//由類別名稱識別是否為特定的文字輸入控制項物件
		public bool IsEditControl
		{
			get 
			{
				string cn=ClassName.ToUpper();
				return (cn=="EDIT" || cn=="THUNDERRT5TEXTBOX" || cn=="RICHCNTL" || cn=="RICHEDIT");
			}
		}

		const uint WM_GETTEXTLENGTH=0x0e;
		const uint WM_GETTEXT=0x0d;
		const uint WM_SETTEXT=0x0c;

		//視窗物件的標題或控制項的文字內容
		public string Text
		{

			get
			{
				if (IsEditControl) //文字輸入方塊物件用WM_GETTEXTLENGTH
				{
					int l=(int) SendMessage(hWnd,WM_GETTEXTLENGTH,0,0);
					StringBuilder sb=new StringBuilder(l+1);
					l=(int) SendMessage(hWnd,WM_GETTEXT,sb.Capacity,sb);
					return sb.ToString();
				}
				else 
				{
					int length = GetWindowTextLength(hWnd);
					StringBuilder sb = new StringBuilder(length + 1);
					GetWindowText(hWnd, sb, sb.Capacity);
					return sb.ToString();				
				}
			}
			set
			{
				if (IsEditControl) 
					SendMessage(hWnd,WM_SETTEXT,0,value);
				else 
					SetWindowText(hWnd, value);
			}
		}
		
		//Windows API，將視窗物件帶至前景
		[DllImport("user32.dll")]
		static extern bool BringWindowToTop(IntPtr hWnd);
		//Windows API，以類別名稱與視窗標題尋找特定視窗之子視窗
		[DllImport("user32.dll")]
		static extern IntPtr FindWindowEx(IntPtr parent, IntPtr childAfter, string className, string windowName);
		//Windows API，以類別名稱與視窗標題尋找直接隸屬桌面之視窗
		[DllImport("user32.dll", EntryPoint="FindWindow")]
		static extern IntPtr FindWindowWin32(string className, string windowName);
		//Windows API，傳送Message給特定視窗物件
		[DllImport("user32.dll")]
		public static extern long SendMessage(IntPtr hWnd, uint msg, uint wParam, uint lParam);
		//Windows API，同上，最後參數可取回字串值，應用於WM_GETTEXT(直接用StringBuilder接回字串只適用於System Message 0-WM_USER，詳見SendMessage Function的MSDN說明)
		[DllImport("user32.dll")]
		public static extern long SendMessage(IntPtr hWnd, uint msg, int wparam, StringBuilder sb);
		//Windows API，同上，最後參數可傳入字串值，應用於WM_SETTEXT
		[DllImport("user32.dll")]
		public static extern long SendMessage(IntPtr hWnd, uint msg, uint wparam, string text);
		//Windows API，取得視窗標題
		[DllImport("user32.dll")]
		static extern int GetWindowText(IntPtr hWnd, [In][Out] StringBuilder text, int copyCount);
		//Windows API，設定視窗標題
		[DllImport("user32.dll")]
		static extern bool SetWindowText(IntPtr hWnd,[MarshalAs(UnmanagedType.LPTStr)] string text);
		//Windows API，取得視窗標題的長度，這是透過PInvoke取回字串時的必要前置作業
		[DllImport("user32.dll")]
		static extern int GetWindowTextLength(IntPtr hWnd);
		//Windows API，取得視窗物件的類別名稱
		[DllImport("user32.Dll")]
		public static extern void GetClassName(int h, StringBuilder s, int nMaxCount);
		//Windows API，取得座標及尺寸資訊
		[DllImport("user32.dll")]
		public static extern bool GetWindowRect(IntPtr hwnd, ref Rect rectangle);	
		//Windows API，取得所屬執行緒或程序之ID
		[DllImport("user32.dll")]
		static extern uint GetWindowThreadProcessId(IntPtr hWnd, ref uint processId);
		//Windows API，視窗是否被最小化
		[DllImport("user32.dll")]
		static extern bool IsIconic(IntPtr window);
		//Windows API，改變視窗的狀態(最大化、最小化等)
		[DllImport("user32.dll")]
		private static extern int ShowWindow(IntPtr hWnd, int nCmdShow);
	}
}



===<end>=====

==<box>==========
// 程式2 模擬中文輸入動作，送出Message的原理請參考圖2-9
public static void KeyIn(WinObject win, string words) 
{
	const byte VK_PROCESSKEY = 0xe5;
	const int WM_CHAR = 0x102;
	keybd_event(VK_PROCESSKEY, 0x1c, 0, IntPtr.Zero);
	byte[] b=Encoding.GetEncoding("big5").GetBytes(words);
	for (int i=0; i<b.Length; i++) 
		win.SendMessage(WM_CHAR,b[i],1);
	keybd_event((byte) VKMap.VK_RETURN, 0x1c, KEYEVENTF_KEYUP, IntPtr.Zero);
}
	===<end>=====

==<box>==========
//程式3，IE URL輸入欄位(Edit控制項物件)的從屬架構請參考圖2-4
private void button1_Click(object sender, System.EventArgs e)
{
	WinObject ie=WinObject.FindWindow("IEFrame",null); //找到IE視窗，標題為null表示不限定
	ie.BringWindowToTop(); //帶至前景並取得焦點
	//找到URL輸入方格(Textbox)，其實是個Edit物件
	WinObject addressEdit=ie.FindChild("WorkerW","").FindChild("ReBarWindow32","").FindChild("ComboBoxEx32",null)
.FindChild("ComboBox","").FindChild("Edit",null);
	//由座標資訊找出TextBox在螢幕上的位置
	Rect rect=addressEdit.Rectangle;
	//Double Click TextBox以取得輸入焦點
	MouseAgent.DoubleClick(rect.left+2,rect.top+2,200);
	//傳入目標視窗及要輸入的字串內容
	KbAgent.KeyIn(addressEdit,"可以填入中文了! Good job!");
}
===<end>=====