using?System;
using?System.Windows.Forms;
using?System.Drawing;
using?System.Runtime.InteropServices;
using?System.Drawing.Printing;

namespace?RichTextBoxPrintCtrl
{
????public?class?RichTextBoxPrintCtrl?:?RichTextBox
????{
????????//Convert?the?unit?used?by?the?.NET?framework?（1/100?inch）?
????????//and?the?unit?used?by?Win32?API?calls?（twips?1/1440?inch）
????????private?const?double?anInch?=?14.4;

????????[StructLayout（LayoutKind.Sequential）]
????????private?struct?RECT
????????{
????????????public?int?Left;
????????????public?int?Top;
????????????public?int?Right;
????????????public?int?Bottom;
????????}

????????[StructLayout（LayoutKind.Sequential）]
????????private?struct?CHARRANGE
????????{
????????????public?int?cpMin;?????????//First?character?of?range?（0?for?start?of?doc）
????????????public?int?cpMax;???????????//Last?character?of?range?（-1?for?end?of?doc）
????????}

????????[StructLayout（LayoutKind.Sequential）]
????????private?struct?FORMATRANGE
????????{
????????????public?IntPtr?hdc;?????????????//Actual?DC?to?draw?on
????????????public?IntPtr?hdcTarget;???????//Target?DC?for?determining?text?formatting
????????????public?RECT?rc;????????????????//Region?of?the?DC?to?draw?to?（in?twips）
????????????public?RECT?rcPage;????????????//Region?of?the?whole?DC?（page?size）?（in?twips）
????????????public?CHARRANGE?chrg;?????????//Range?of?text?to?draw?（see?earlier?declaration）
????????}

????????private?const?int?WM_USER?=?0x0400;
????????private?const?int?EM_FORMATRANGE?=?WM_USER?+?57;

????????[DllImport（“USER32.dll“）]
????????private?static?extern?IntPtr?SendMessage（IntPtr?hWnd?int?msg?IntPtr?wp?IntPtr?lp）;

????????//?Render?the?contents?of?the?RichTextBox?for?printing
????????//	Return?the?last?character?printed?+?1?（printing?start?from?this?point?for?next?page）
????????public?int?Print（int?charFrom?int?charTo?PrintPageEventArgs?e）
????????{
????????????//Calculate?the?area?to?render?and?print
????????????RECT?rectToPrint;
????????????rectToPrint.Top?=?（int）（e.MarginBounds.Top?*?anInch）;
????????????rectToPrint.Bottom?=?（int）（e.MarginBounds.Bottom?*?anInch）;
????????????rectToPrint.Left?=?（int）（e.MarginBounds.Left?*?anInch）;
????????????rectToPrint.Right?=?（int）（e.MarginBounds.Right?*?anInch）;

????????????//Calculate?the?size?of?the?page
????????????RECT?rectPage;
????????????rectPage.Top?=?（int）（e.PageBounds.Top?*?anInch）;
????????????rectPage.Bottom?=?（int）（e.PageBounds.Bottom?*?anInch）;
????????????rectPage.Left?=?（int）（e.PageBounds.Left?*?anInch）;
????????????rectPage.Right?=?（int）（e.PageBounds.Right?*?anInch）;

????????????IntPtr?hdc?=?e.Graphics.GetHdc（）;

????????????FORMATRANGE?fmtRange;
????????????fmtRange.chrg.cpMax?=?charTo;				//Indicate?character?from?to?character?to?
????????????fmtRange.chrg.cpMin?=?charFrom;
????????????fmtRange.hdc?=?hdc;????????????????????//Use?the?same?DC?for?measuring?and?rendering
????????????fmtRange.hdcTarget?=?hdc;????????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????399??2011-10-13?03:07??BWAcs\app.config

?????文件?????208896??2011-12-06?12:41??BWAcs\bin\Debug\BWAcs.exe

?????文件????????399??2011-10-13?03:07??BWAcs\bin\Debug\BWAcs.exe.config

?????文件?????124416??2011-12-06?12:41??BWAcs\bin\Debug\BWAcs.pdb

?????文件???????5632??2005-12-08?14:51??BWAcs\bin\Debug\BWAcs.vshost.exe

?????文件????????399??2011-10-13?03:07??BWAcs\bin\Debug\BWAcs.vshost.exe.config

?????文件???????8477??2011-11-07?18:09??BWAcs\BWAcs.csproj

?????文件???????4014??2011-11-10?15:27??BWAcs\Class1.cs

?????文件??????59487??2011-12-06?12:41??BWAcs\Form1.cs

?????文件??????88897??2011-11-10?23:12??BWAcs\Form1.Designer.cs

?????文件??????28299??2011-11-10?23:12??BWAcs\Form1.resx

?????文件???????1126??2011-11-09?01:11??BWAcs\Formabout.cs

?????文件???????5980??2011-11-09?01:11??BWAcs\Formabout.Designer.cs

?????文件???????8421??2011-11-09?01:11??BWAcs\Formabout.resx

?????文件????????334??2011-10-08?19:29??BWAcs\Formadd.cs

?????文件???????3044??2011-10-08?19:29??BWAcs\Formadd.Designer.cs

?????文件???????5814??2011-10-08?19:29??BWAcs\Formadd.resx

?????文件???????4287??2011-10-17?14:04??BWAcs\formFind.cs

?????文件???????6958??2011-10-17?08:51??BWAcs\formFind.Designer.cs

?????文件???????8226??2011-10-17?08:51??BWAcs\formFind.resx

?????文件???????2518??2011-11-11?00:14??BWAcs\FormGY.cs

?????文件??????13323??2011-11-11?00:14??BWAcs\FormGY.Designer.cs

?????文件???????8420??2011-11-11?00:14??BWAcs\FormGY.resx

?????文件???????6076??2011-10-17?16:30??BWAcs\formReplace.cs

?????文件???????8988??2011-10-17?16:11??BWAcs\formReplace.Designer.cs

?????文件???????8226??2011-10-17?16:11??BWAcs\formReplace.resx

?????文件????????435??2012-02-08?23:15??BWAcs\obj\BWAcs.csproj.FileList.txt

?????文件???????2460??2011-11-11?00:14??BWAcs\obj\Debug\BWAcs.csproj.GenerateResource.Cache

?????文件?????208896??2011-12-06?12:41??BWAcs\obj\Debug\BWAcs.exe

?????文件??????14132??2011-11-10?23:12??BWAcs\obj\Debug\BWAcs.Form1.resources

............此處省略111個文件信息