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.Drawing.Drawing2D;

namespace?WindowsFormsApplication32
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????private?void?Form1_Load（object?sender?EventArgs?e）
????????{

????????}

????????private?void?Form1_Paint（object?sender?PaintEventArgs?e）
????????{
????????????
????????????Arrow（e.Graphics?20?20?200?220?50）;
????????}
????????///?

????????///?
????????///?

????????///?
????????///?起點(diǎn)X
????????///?起點(diǎn)Y
????????///?終點(diǎn)X
????????///?終點(diǎn)Y
????????///?箭頭大小
????????public?void?Arrow（Graphics?Pic?float?X0?float?Y0?float?X1?float?Y1?float?ArrowLen）
????????{
????????????Pic.SmoothingMode?=?SmoothingMode.AntiAlias;
????????????float?Xa;
????????????float?Ya;
????????????float?Xb;
????????????float?Yb;
????????????float?D;
????????????Pen?p?=?new?Pen（Color.Black?3）;
????????????D?=?（float）Math.Sqrt（（Y1?-?Y0）?*?（Y1?-?Y0）?+?（X1?-?X0）?*?（X1?-?X0））;
????????????if?（D?>?0.0000000001）
????????????{
????????????????Xa?=?X1?+?ArrowLen?*?（（X0?-?X1）?+?（Y0?-?Y1）?/?（float）2）?/?D;
????????????????Ya?=?Y1?+?ArrowLen?*?（（Y0?-?Y1）?-?（X0?-?X1）?/?（float）2）?/?D;
????????????????Xb?=?X1?+?ArrowLen?*?（（X0?-?X1）?-?（Y0?-?Y1）?/?（float）2）?/?D;
????????????????Yb?=?Y1?+?ArrowLen?*?（（Y0?-?Y1）?+?（X0?-?X1）?/?（float）2）?/?D;


????????????????Pic.DrawLine（p?Xa?Ya?X1?Y1）;
???????????????//?Pic.Line（Xa?Ya）;/*?TODO?ERROR:?Skipped?SkippedTokensTrivia?*//*?TODO?ERROR:?Skipped?SkippedTokensTrivia?*/
????????????????//Pic.Line（Xb?Yb）;/*?TODO?ERROR:?Skipped?SkippedTokensTrivia?*//*?TODO?ERROR:?Skipped?SkippedTokensTrivia?*/
????????????????Pic.DrawLine（p?Xb?Yb?X1?Y1）;
???????????????//?Pic.Line（X0?Y0）;/*?TODO?ERROR:?Skipped?SkippedTokensTrivia?*//*?TODO?ERROR:?Skipped?SkippedTokensTrivia?*/?//?如果僅畫(huà)箭頭，此句可刪除
????????????????Pic.DrawLine（p?X0?Y0?X1?Y1）;
????????????}
????????}

????}
}

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????9216??2018-11-13?13:34??WindowsFormsApplication32\WindowsFormsApplication32\bin\Debug\WindowsFormsApplication32.exe

?????文件??????26112??2018-11-13?13:34??WindowsFormsApplication32\WindowsFormsApplication32\bin\Debug\WindowsFormsApplication32.pdb

?????文件??????11600??2018-11-13?13:33??WindowsFormsApplication32\WindowsFormsApplication32\bin\Debug\WindowsFormsApplication32.vshost.exe

?????文件????????490??2012-06-06?02:06??WindowsFormsApplication32\WindowsFormsApplication32\bin\Debug\WindowsFormsApplication32.vshost.exe.manifest

?????文件???????2369??2018-11-13?13:34??WindowsFormsApplication32\WindowsFormsApplication32\Form1.cs

?????文件???????1569??2018-11-13?13:08??WindowsFormsApplication32\WindowsFormsApplication32\Form1.Designer.cs

?????文件???????5817??2018-11-13?13:08??WindowsFormsApplication32\WindowsFormsApplication32\Form1.resx

?????文件???????2867??2018-11-13?13:07??WindowsFormsApplication32\WindowsFormsApplication32\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache

?????文件???????6411??2018-11-13?13:34??WindowsFormsApplication32\WindowsFormsApplication32\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件????????890??2018-11-13?13:33??WindowsFormsApplication32\WindowsFormsApplication32\obj\x86\Debug\WindowsFormsApplication32.csproj.FileListAbsolute.txt

?????文件????????975??2018-11-13?13:09??WindowsFormsApplication32\WindowsFormsApplication32\obj\x86\Debug\WindowsFormsApplication32.csproj.GenerateResource.Cache

?????文件???????9216??2018-11-13?13:34??WindowsFormsApplication32\WindowsFormsApplication32\obj\x86\Debug\WindowsFormsApplication32.exe

?????文件????????180??2018-11-13?13:09??WindowsFormsApplication32\WindowsFormsApplication32\obj\x86\Debug\WindowsFormsApplication32.Form1.resources

?????文件??????26112??2018-11-13?13:34??WindowsFormsApplication32\WindowsFormsApplication32\obj\x86\Debug\WindowsFormsApplication32.pdb

?????文件????????180??2018-11-13?13:09??WindowsFormsApplication32\WindowsFormsApplication32\obj\x86\Debug\WindowsFormsApplication32.Properties.Resources.resources

?????文件????????506??2018-11-13?13:07??WindowsFormsApplication32\WindowsFormsApplication32\Program.cs

?????文件???????1400??2018-11-13?13:07??WindowsFormsApplication32\WindowsFormsApplication32\Properties\AssemblyInfo.cs

?????文件???????2902??2018-11-13?13:07??WindowsFormsApplication32\WindowsFormsApplication32\Properties\Resources.Designer.cs

?????文件???????5612??2018-11-13?13:07??WindowsFormsApplication32\WindowsFormsApplication32\Properties\Resources.resx

?????文件???????1112??2018-11-13?13:07??WindowsFormsApplication32\WindowsFormsApplication32\Properties\Settings.Designer.cs

?????文件????????249??2018-11-13?13:07??WindowsFormsApplication32\WindowsFormsApplication32\Properties\Settings.settings

?????文件???????3709??2018-11-13?13:09??WindowsFormsApplication32\WindowsFormsApplication32\WindowsFormsApplication32.csproj

?????文件????????917??2018-11-13?13:07??WindowsFormsApplication32\WindowsFormsApplication32.sln

????..A..H.??????9216??2018-11-13?13:22??WindowsFormsApplication32\WindowsFormsApplication32.suo

?????目錄??????????0??2018-11-13?13:07??WindowsFormsApplication32\WindowsFormsApplication32\obj\x86\Debug\TempPE

?????目錄??????????0??2018-11-13?13:34??WindowsFormsApplication32\WindowsFormsApplication32\obj\x86\Debug

?????目錄??????????0??2018-11-13?13:09??WindowsFormsApplication32\WindowsFormsApplication32\bin\Debug

?????目錄??????????0??2018-11-13?13:07??WindowsFormsApplication32\WindowsFormsApplication32\obj\x86

?????目錄??????????0??2018-11-13?13:07??WindowsFormsApplication32\WindowsFormsApplication32\bin

?????目錄??????????0??2018-11-13?13:07??WindowsFormsApplication32\WindowsFormsApplication32\obj

............此處省略6個(gè)文件信息