;回撥函式有特定的名字，在特定的時間呼叫
　　;目前可用的callback functions:
　　1.    .onGUIInit
　　;this callback will be called just before the first page is loaded and the installer dialog is shown
　　; allowing you to tweak(調整) the user interface
　　!include "WinMessages.nsh"
　　Function .onGUIInit
　　GetDlgItem $R0 $HWNDPARENT 1028
　　CreateFont $R1 "Tahoma" 10 700
　　SendMessage $R0 ${WM_SETFONT} $R1 0
　　#set background color to white and text color to red
　　SetCtlColors $R0 FFFFFF FF0000
　　FunctionEnd
　　2.    .onInit;即將完成初始化
　　;this function will be called when the installer is nearly finished initializing. if the '.onInit' function
　　; calls abort,the installer will quit instantly.
　　Function .onInit
　　MessageBox MB_YESNO "This will install .Continue?" IDYES NoAbort
　　Abort;causes installer to quit.
　　FunctionEnd
　　3.    .onInstFailed;安裝失敗時點選取消
　　;this callback is called when the user hits the 'cancel' button after the install has failed
　　Function .onInstFailed
　　MessageBox MB_OK "Better luck next time."
　　FunctionEnd
　　4.    .onInstSuccess ;安裝成功視窗關閉前
　　;this callback is called when the install was successful,right before the install window closes(which
　　;may be after the user clicks 'Close' if AutoCloseWindow or SetAutoClose is set to false)
　　Function .onInstSuccess
　　MessageBox MB_YESNO "Congrats,it worked.View readme?" IDNO NoReadme
　　Exec notepad.exe;view readme or whatever if you want.
　　NoReadme:
　　FunctionEnd
　　5.    .onGUIEnd；;安裝成功視窗關閉後
　　;this callback is called right after the installer window closes.Use it to free any user interface
　　;related plug-ins if needed
　　6.    .onMouseOverSection;滑鼠放置的session發生變化是被呼叫，可以用於改變描述資訊
　　;this callback is called whenever the mouse position over the sections tree has changed.this allows
　　;you to set a description for each section for example.this section id on which the mouse is over
　　;currently is stored ,temporarily,in $0
　　Function .onMouseOverSection
　　FindWindow $R0 "#32770" "" $HWNDPARENT
　　GetDlgItem $R0 $R0 1043
　　StrCmp $0 0 "" +2
　　SendMessage $R0 ${WM_SETTEXT} 0 "STR:first section description"
　　StrCmp $0 1 "" +2
　　SendMessage $R0 ${WM_SETTEXT} 0 "STR:second section description"
　　FunctionEnd
　　7.    onRebootFailed;自動重啟失敗
　　;this callback is called if Reboot fails.WritUninstaller,plug-ins,File and WriteRegBin should not be used
　　;in this callback
　　Function .onRebootFailed
　　MessageBox MB_OK|MB_ICONSTOP "Reboot failed,Please reboot manually." /SD IDOK
　　FunctionEnd
　　8.    onSelChange;選擇發生變化
　　;called when the selection changes on the component page.Usefull for using with SectionSetFlags and
　　;SectionSetFlags and SectionGetFlags.
　　;selection changes include both section selection and installation type change.
　　9.    onUserAbort
　　;安裝還沒有失敗但使用者選擇了取消時呼叫，呼叫Abort時，程式不會退出
　　;called when the user hits the 'cancel' button,and the install hasn't already failed.If this function
　　;calls Abort,the install will not be aborted.
　　Function
　　MessageBox MB_YESNO "Abort install?" IDYES NoCancelAbort
　　Abort;
　　NoCancelAbort:
　　do something
　　FunctionEnd
　　10.    .onVerifyInstDir
　　;在安裝資料夾改變後呼叫，檢查該路徑是否有效，如果呼叫了Abort則$INSTDIR視為無效
　　;enables control over whether or not an installation path is valid for your installer. This code will be
　　;called every time the user changes the install directory,so it shouldn't do anything crazy with MessageBox
　　;or the likes.If this function calls Abort,the installation path in $INSTDIR is deemed invalid.
　　Function
　　IfFileExists $INSTDIR\Winamp.exe PathGood
　　Abort
　　PathGood:
　　FunctionEnd
　　Uninstall Callbacks
　　11.    un.onGUIInit;解除安裝程式的類似於.onGUIInit
　　;called just before the first page is loaded and the installer dialog is shown, allowing you to tweak the
　　;user interface.
　　12.    un.onInit;若呼叫了Abort,程式直接退出，在有必要時檢查一下$INSTDIR
　　;this callback will be called when the uninstaller is nearly finished initializeing.If the
　　;'un.onInit' function calls Abort,the uninstaller will quit instantly.Note that this function can verify
　　;and/or modify $INSTDIR if necessary.
　　Function un.onInit
　　MessageBox MB_YESNO "This will uninstall." IDYES NoAbort
　　Abort
　　NoAbort:
　　FunctionEnd
　　Function un.onInit
　　IfFileExists $INSTDIR\myfile.exe found
　　MessageBox MB_OK "Uninstall path incorrent"
　　Abort
　　found:
　　FunctionEnd
　　13.    un.onUninstFailed
　　;called when the user hits the 'cancel' button after the uninstall has failed(if it used the 
　　;Abort command or otherwise failed).
　　14.    un.onUninstSuccess
　　15.    un.onGUIEnd
　　16.    un.onRebootFailed
　　17.    un.onSelChange
　　18.    un.onUserAbort
　　Installer Attributes
　　these attributes control how the installer looks and functions,including which pages are present in the
　　installer ,as what text is displayed in each part of each page,how the installer is named,what icon the
　　installer uses,the default installation directory,what file it writes out,and more,note that these attributes
　　can be set anywhere in the file except in a Section or Function .
　　注意這些屬性可以在任何地方設定但是不能在Section和Function中設定
　　1.    AddBrandingImage
　　為installer新增一個圖示，但不是icon,its size will be set according to the width/height specified,the installer's
　　width/height and the installer font,the final size will not always be what you requested;
　　AddBrandingImage only adds a placeholder for an image,to set the image itself on runtime,use SetBrandingImage
　　2.    AllowRootDirInstall
　　controls whether or not installs are enabled to the root directory of a dirve,or directly into a network
　　share,set to true to change the safe behavior,which prevents users from selecting C:\ or \\Server\Share as an
　　install(and later on ,uninstall)directory,for additional directory selection page customizability,
　　3.    AutoCloseWindow[true]/[false]
　　Set whether or not the install window automatically closes when completed.This is overrideable from a
　　section using SetAutoClose
　　4.    BGFont;設定背景gradient上的字型
　　Specifies the font used to show the text on the background gradient.To set the color use BGGradient.
　　IF no parameters are specified ,the default font will be used,the default font is bold and italic Times New Roman
　　5.    BGGradient;設定背景gradient上字型的顏色，以及是否顯示這樣一個漸變背景
　　6.    BrandingText /TRIM(LEFT|RIGHT|CENTER) text
　　新增一些文字，但不是視窗標題，預設的是"Nullsoft Install System Vx.xx",text is shown at the bottom of the
　　install winidow,setting this to an empty string("") uses the default; to set the string to blank use " "
　　後面是靠左，居中和靠右
　　accepts variables .if variables are used,they must be initialized on .onInit
　　7.    Caption caption
　　when used outside a PageEx block:set the text for the titlebar of the installer,the By default,it is 
　　'Name Setup',where name is specified with the Name instruction.You can howerver,override it with 
　　'My App installer' or whatever
　　when used in a PageEx block:sets the subcaption of the current page.
　　accepts variables .if variables are used,they must be initialized on .onInit
　　8.    ChangeUI dialog ui_file.exe
　　Replaces dialog(IDD_LICENSE,IDD_DIR,IDD_SELCOM,IDD_INST,IDD _INSTFILES,IDD_UNINST or IDD_VERIFY)
　　by a dialog with the same resource ID in ui_file.exe.you can also specify 'all' as the dialog if you
　　wish to replace all 7 of the dialogs at one from the same UI file:
　　a.IDD_LICENSE must contain IDC_EDIT1(RICHEDIT control)
　　b.IDD_DIR must contain IDC_DIR(edit box),IDC_BROWSE(button) and IDC_CHECK1(checkbox)
　　c.IDD_SELCOM must contain IDC_TREE1(SysTreeView32 control),and IDC_COMBO1(combo box)
　　d.IDD_INST must contain IDC_BACK(button).If an image control (static with SS_BITMAP style) will be found
　　in this dialog it will be used as the default fro SetBrandingImage.
　　e.IDD_INSTFILES must contain IDC_LIST1(SysListView32 control),IDC_PROGRESS(msctls_progress32 control),and
　　IDC_SHOWDETAILS(button).
　　f.IDD_UNINST must contain IDC_EDIT1(edit box)
　　g.IDD_VERIFY must contain IDC_STR(static).
　　ChangeUI all "${NSISDIR}\Contrib\UIs\sdbarker_tiny.exe"
　　9.    CheckBitmap bitmap.bmp ;規格：96*16 pixels 狀態selection mask,checked,greyed out, unchecked&read-only...
　　Specifies the bitmap with the images used for the checks of the component-selection page treeview.
　　10.    CompletedText text
　　Replaces the default text("Completed") that is Printed at the end of the install if parmeter is specified
　　Otherwise the default is used.
　　accepts variables,but they should be initialized before the message is printed!
　　11.    ComponentText [text [subtext] [subtext2]]
　　Used to change the default text on the component page.
　　text:Text above the controls,to the right of the installation icon.
　　Subtext:Text next to the installation type selection
　　subtext2:Text to the left of the components list and below the installation type
　　the default string will be used if a string is empty("")
　　accepts variables.....
　　12.    DetailsButtonText show details text
　　replace the default details button text
　　13    DirText [text] [subtext] [browse_button_text] [browse_dlg_text]
　　used to change the default text on the directory page.
　　text: text above the controls to the right of the installation icon.
　　subtext: text on the directory selection frame.
　　browse_button_text:text on the browse button
　　browse_dlg_text:text on the "browse for folder" dialog,appears after clicking on "Browse" button
　　defalut ""
　　14    DirVar user_var(dir input/output)
　　specifies which variable is to be used to contain the directory selected.this variable should contain
　　the default value too. this allows to easily create two different directory pages that not require you
　　to move values in and out of $INSTDIR,the default variable is $INSTDIR,This can only be used in PageEx and
　　for directory and uninstConfirm pages.
　　15    DirVerify  auto|leave
　　;檢查資料夾是否合法以及是否有足夠的空間
　　if DirVerify leave is used,the Next Button will not be disabled if the dir is not valid
　　16    FileErrorText file error text
　　;當檔案無法寫入時的的提示錯誤資訊，檔名在$0中,
　　Replaces the default text that comes up when a file cannot be written to.
　　17 Icon    [patn\]icon.ico
　　;設定安裝包的icon
　　use UninstallIcon to set the Uninstaller icon.
　　18 InstallButtonText install button text
　　;overrides the default install button text(of "Install") with the specified text
　　;accept variables.
　　19    InstallColors /windows|(foreground_color background_color)
　　;set the colors to use for the install info screen 
　　;/windows 指示使用預設的前景和背景色
　　20    InstallDir definstdir
　　Sets the default installation directory.
　　21 InstallDirRegKey root_key subkey key_name
　　;寫登錄檔
　　;this attribute tells the installer to check a string in the registry,and use it for the install dir if
　　;that string is valid.
　　;讓安裝器檢查某個鍵值字串,如果是合法的，將它作為安裝目錄，如果存在此屬性設定且字串合法，它將覆蓋
　　;InstallDir屬性,如果不合法，則使用InstallDir的預設值，在檢查字串時，引號會自動被移除，並且：
　　;"c:\c\abc.exe"會變成"c"\c";
　　;Language strings和變數不能被使用
　　InstallDirRegKey HKLM Software\NSIS "ABC.EXE"
　　22 InstProgressFlags [flag[....]]
　　;flag的有效值是：smooth or colored
　　e.g:
　　InstProgressFlags
　　InstProgressFlags smooth
　　InstProgressFlags smooth colored
　　when XPStyle on ...
　　23 InstType install_type_name | /NOCUTOM |/CUSTOMSTRING=str|/COMPONENTSONLYONCUSTOM
　　;add an install type to the install type list,or disables the custom install type.
　　;安裝型別，一般有custom,全部安裝，還有自定義
　　;there can be as many as 32 types,each one specifying the name of the install type.
　　;如果前面有'.un'字首，則是解除安裝型別，名字中可以包含變數，which will be processed at runtime before the
　　components page shows.another way of changing the InstType name during runtime is the InstTypeSetText
　　command.the difference is that with InstTypeSetText you are saving your precious user variables,the first
　　type is the default (generally 'Typical').If the /NOCUSTOM switch is specified,then the "custom" install
　　type is disabled,and the user has to choose one of the pre-defined install types,Alternatively,if the 
　　/CUSTOMSTRING switch is specified,the parameter will override the "custom" install type text,Alternatively
　　if the /COMPONENTSONLYONCUSTOM flag is specified th ecomponent list will only be shown if the "Custom"
　　install type is selected.
　　24 LicenseBkColor color | /gray | /windows
　　;Sets the background color of the license data.Color is specified using the form RPGGBB
　　;/gray
　　;/windows
　　25 LicenseData licdata.(txt|rtf)
　　;LicenseData lic.txt
　　;LicenseData lic.rtf
　　use LicenseLangString to show a different license for every language
　　26 LicenseForceSelection (checkbox [accept_text] |radiobuttons [accept_text] [decline_text]|off)
　　;Specifieds if the displayed license must be accept explicit or not.
　　;if off is specified the "next button " is enabled by default.
　　27 LicenseText [text [button_text]]
　　; Used to change the default text on the license page.
　　;text: Text above the controls,to the right of the installation icon.
　　;button_text:text on the "I Agree" button.
　　;default string will be used if a string is empty("").
　　28 MiscButtonText[back button text [next button text]] [cancel button text] [close button text]
　　;Replaces the default text strings for the four buttons(Back,Next,Cancel,Close)
　　;accept variables.
　　29 Name name[name_coubled_ampersands]
　　;Name "MyAPP"                                    = "MyAPP"
　　;Name "Foo & Bar" "Foo && Bar"                     = "Foo & bar"
　　30 OutFile [path\]install.exe
　　;Specifies the output file that the MakeNSIS should write the installer to .
　　;this is just the file that MakeNSIS writes,it doesn't affect the contents of the installer.
　　31 RequestExecutionLevel none|user|highest|admin
　　;Specifies the requested execution level for windows Vista and wiindows 7
　　32  SetFont [/LANG = lang_id] font_face_name font_size
　　;Set the installer font.
　　;設定安裝包的字型，該字型必須存在於使用者的機器上，儘量使用常用字型
　　;SetFont /LANG=${LANG_ENGLISH} "english font" 9
　　33 ShowInstDetails hide|show|nevershow
　　;Sets whether or not the details of the uninstall are shown.default is hide
　　note that sectins can override this using SetDetailsView
　　34 ShowUninstDetails hide|show|nevershow
　　;Sets whether or not the details of the uninstall are shown. default is hide.
　　note that sectins can override this using SetDetailsView
　　35 SilentInstall normal|silent|silentlog
　　Specifies whether or not the installer should be silent.If it is 'silent' or 'silentlog',all sections
　　that have the SF_SELECTED flag are installed quietly(you can set tis flag using SectionSetFlags),with
　　no screen output from the installer ifself
　　36 SilentUnInstall normal |silent
　　37 SpaceTexts [reg text [avail text]]
　　if parameters are specified,overrides the space required and space available text("Space required:" and 
　　"Space available:" by default). IF 'none' is specified as the required text no space texts will be shown.
　　38 SubCaption [page_number subcaption]
　　Overrides the subcaptions for each of the installer pages (0=":License Agreement",1=":Installation Options"...)
　　;視窗標題
　　you can also set a subcaption using Caption inside a PageEx block
　　39 UninstallButtonText text
　　Changes the text of the button that by default says "Unistall" in the uninstaller
　　40 UninstallCaption caption
　　sets what the titlebars of the uninstaller will display, default it is 'Name Uninstall'
　　UninstallCaption "myapp Uninstall"
　　41 UninstallIcon [path\]icon.ico
　　sets the icon of the uninstaller
　　42 UninstallSubCaption page_number subcaption
　　set the default subcaptions for the uninstaller pages(0=":Confirmation",1=":Uninstalling Files",
　　2=":Completed").
　　using Caption inside a PageEx block
　　43 UninstallText text [subtext]
　　Specifies the texts on the uninstaller confirm page.
　　text:
　　subtext:
　　44 WindowIcon on|off
　　Sets whether or not the installer's icon is being displayed
　　45 XPStyle on|off
　　Set whether or not an XP manifest will be added to the installer,
　　this affects the uninstaller too.
　　Compiler Flags
　　；編譯選項
　　the following commands affect how the compiler generates code and compresses data.Unless otherwise noted,
　　these commands are valid anywhere in the script,and effect every line below where each one is placed until
　　overridden by another command,they cannot be jumped over using flow control instruction
　　46 AllowSkipFiles on|off
　　;on 時允許user skip file,off時，只有abort安裝
　　this command specifies whether the user should be able to skip a file or not.
　　a user has an option to skip a file if SetOverwrite is set to on,and the installer fails to open a file
　　for writing when trying to extract a file. if off is used the ignore button which allows the user to skip
　　the file will not show and the user will only have an option to abort the installation
　　47 FileBufSize buffer_size_in_mb
　　;記憶體使用率
　　this command sets the size of the compiler's internal file buffers. This command allows you to control the
　　compiler's memory usage by limiting how much of a given file it will load into memory at once.since the
　　compiler needs both input and output,twice the memory size specified could be used at given time for file
　　buffers.
　　48 SetCompress auto|force|off
　　this command sets the compress flag which is used by the installer to determine whether or not data should
　　be compressed
　　49 SetCompressor [/SOLID][/FINAL] zlib|bzip2|lzma
　　;設定壓縮演算法，不能在section和functions中使用且必須在壓縮前使用
　　this command sets the compression algorithm used to compress filese/data in the installer.
　　ZLIB: (the default) it is a quick and simple method, 300kb memory uses
　　BZIP2: gives better compression raios than ZLIB but a bit slower and uses more memory,4M memory uses
　　LZMA: a new compression method that gives very good compression ratios,compression speed is lower but 
　　decompression speed is high ,8M memory uses
　　if /FINAL is used,subsequent calls to SetCompressor will be ignored.即後面的呼叫將被忽略
　　if /SOLID is used,all of the installer data is compressed in one block,result in greater compression ratios
　　50 SetCompressorDictSize dict_size_mb
　　Sets the dictionary size in megabytes used by the LZMA compressor
　　51 SetDatablockOptimize on|off
　　;可以讓壓縮包更小，推薦on
　　this command tells the compiler whether or not to do datablock optimizations.Datablock optimizations have
　　the compiler check
　　52    SetDateSave on|off
　　this command sets the file date/time saving flag which is used by the File command to determine whether or
　　not to save the last write date and time of the file,so that it can be restored on installation.Valid flags
　　are 'on' and 'off' ,'on' is default
　　53 SetOverwrite on|off|try|ifnewer|ifdiff|lastused
　　;是否覆蓋已經存在的檔案
　　on 直接覆蓋(default)
　　off 不覆蓋
　　try 如果能覆蓋則覆蓋
　　ifnewer 如果存在的檔案更舊
　　ifdiff 不同，更新或更舊
　　lastused
　　Version Information
　　54 VIAddVersionKey [/LANG=lang_id] keyname_value
　　add a field in the Version Tab of the File Properties,this can either be a field provided b the system
　　or a user defined field.The following fields are provided by the System:
　　.ProductName
　　.Comments
　　.CompanyName
　　.LegalCopyright
　　.FileDEescription
　　.InternalName
　　.LegalTrademarks
　　.OriginalFilename
　　.PrivateBuild
　　.SpecialBuild
　　VIAddVersionKey /LANG=${LANG_ENGLISH} "ProductName" "Test Application"
　　VIAddVersionKey /LANG=${LANG_ENGLISH} "Comments" "A test comment"
　　VIAddVersionKey /LANG=${LANG_ENGLISH} "CompanyName" "Fake company"
　　VIAddVersionKey /LANG=${LANG_ENGLISH} "LegalTrademarks" "Test Application is a trademark of Fake company"
　　VIAddVersionKey /LANG=${LANG_ENGLISH} "LegalCopyright" "? Fake company"
　　VIAddVersionKey /LANG=${LANG_ENGLISH} "FileDescription" "Test Application"
　　VIAddVersionKey /LANG=${LANG_ENGLISH} "FileVersion" "1.2.3"
　　55 VIProductVersion [version-string_X.X.X.X]
　　adds the Product Version on top of the Version Tab in the Properties of the file.
　　VIProductVersion "1.2.3.4"
　　Instructions
　　Basic Instructions
　　1. Delete [/REBOOTOK] file
　　刪除檔案(可以包含萬用字元也可以是絕對路徑)
　　/REBOOTOK 選項指定重啟後刪除
　　找到檔案但無法刪除 error flag is set
　　沒有找到檔案error flag is not set
　　Delete $INSTDIR|test.dat
　　2. Exec command
　　執行指定的program,指定的程式必須存在 $OUTDIR is used for the working directory
　　指定程式無法啟動時，error flag is set
　　Exec '"$INSTDIR\text.exe"'
　　Exec '"$INSTDIR\text.exe" some parameters'
　　3. ExecShell action command [parameters [SW_SHOWDEFAULT|SW_SHOWNORMAL|SW_SHOWMAXIMIZED|SW_ SHOWMINIMIZED|SW_HIDE]]
　　使用ShellExecute來執行一個程式，通常執行"open","print" 等
　　$OUTDIR 是工作目錄
　　error flag is set 如果無法啟動
　　ExecShell "open" "http://nsis.sf.net"
　　ExecShell "open" "$INSTDIR\readme.txt"
　　4. ExecWait command[user_var(exit code)]
　　執行一個程式且等待該程式程序結束，
　　if no ouput variable is specified
　　如果該程式沒有返回值返回nonzero error code或執行出錯，error flag is set,
　　if an ouput variable is specified
　　該函式將用exit code 填充變數,
　　ExecWait '"$INSTDIR\test.exe"'
　　ExecWait '"$INSTDIR\text.exe"' $0
　　ExecWait '"$INSTDIR\text.exe" some parameters'
　　5 File 
　　.output file name is $OUTDIR\filename_portion_of_file
　　.use /oname = x switch to 改變output name.x可以包含變數，可以是相對或絕對路徑，若包含space 請加上""
　　.支援萬用字元
　　.if /r is used, 遞迴查詢子資料夾
　　. /x is used to exclude files or directories.排除不需要的檔案或資料夾
　　. /a is used,the attributes of the files added will be preserved. 
　　. if /nonfatal is used and no files are found,a warning will be issued instead of an error
　　File something.exe
　　File /a someting.exe
　　File *.exe
　　File /r *.dat
　　File /r data
　　File /oname=temp.dat somefile.ext
　　File /oname=$TEMP\temp.dat somefile.ext
　　File "/oname=$TEMP\name with spaces.dat" somefile.ext
　　File /nonfatal "a file that might not exist"
　　File /r /x CVS myProject\*.*
　　File /r /x *.res /x *.obj /x *.pch source\*.*
　　注意 /r
　　when using the /r switch,both mathing directories and files will be searched.this is always done with or without the use
　　of wildcards,even if the given path perfectly matches one directory,
　　6 Rename [/REBOOTOK] source_file dest_file
　　Rename source_file to des_file
　　if the current folder is not set using SetOutPath instruction the current folder is $EXEDIR
　　可以用來移動檔案和目錄
　　Rename $INSTDIR\file.ext $INSTDIR\file.dat
　　7 ReserveFile [/nonfatal] [/r] [/x file|wildcard [...]] file [file....]
　　Reserves a file in the data block for later use,
　　檔案是按他們在指令碼中出現的順序新增到data block中，而函式則不是按他們出現的順序被呼叫的
　　如果你在一個函式中新增一個檔案，他會被早早的呼叫而你卻把它定義在指令碼的很後面，執行指令碼時，all of the files added earlier will
　　have to be decompressed to get to the required file,
　　此函式可以節省裝載時間，另外，先會被呼叫的函式定義到前面
　　8 RMDir [/r] [/REBOOTOK] directory_name
　　移除資料夾，絕對路徑，
　　沒有 /r時，只有資料夾為空時才會被移除，
　　有/r 時，資料夾被遞迴移除
　　/REBOOTOK 重啟後移除
　　有error flag
　　RMDir $INSTDIR
　　注意：當前資料夾不能被移除， the current working directory is set by SetOutPath
　　SetOutPath $TEMP\dir
　　RMDir $TEMP\dir
　　The next example will succeed in deleting the directory.
　　SetOutPath $TEMP\dir
　　SetOutPath $TEMP
　　RMDir $TEMP\dir
　　使用RMDir/r $INSTDIR in the uninstaller is not safe though it is unlikely
　　因為如果使用者指定 $INSTDIR 是 Program Files時，可能導致整個資料夾被刪除
　　Solutions are available for easily uninstalling only files which were installed by the installer.
　　9 SetOutPath outpath
　　Sets the output path($OUTDIR) and creates it if it does not exist,must be a full pathname,usually is just $INSTDIR
　　you can specify $INSTDIR if you are lazy with a single "-"
　　Registry,INI,File Instructions
　　10 DeleteINISec ini_filename section_name
　　刪除指定的ini檔案的指定section
　　Deletes the entire section [section_name] from ini_filename.If the section could not be removed from te ini file,
　　the error flag is set,it does not set the error flag if the section could not be found
　　WriteINIStr $TEMP\something.ini section1 something 123
　　WriteINIStr $TEMP\something.ini section1 somethingelse 1234
　　WriteINIStr $TEMP\something.ini section2 nsis true
　　DeleteINISec $TEMP\something.ini section1
　　11 DeleteINIStr ini_filename section_name str_name
　　WriteINIStr $TEMP\something.ini section1 something 123
　　DeleteINIStr $TEMP\something.ini section1 something
　　12 DeleteRegKey [/ifempty] root_key subkey
　　Deletes a registry key
　　if /ifempty is specified,the registry key will only be deleted if it has no subkeys
　　root_key valid value:
　　HKCR or HKEY_CLASSES_ROOT
　　HKLM or HKEY_LOCAL_MACHINE
　　HKCU or HKEY_CURRENT_USER
　　HKU or HKEY_USERS
　　HKCC or HKEY_CURRENT_CONFIG
　　HKDD or HKEY_DYN_DATA
　　HKPD or HKEY_PERFORMANCE_DATA
　　SHCTX or SHELL_CONTEXT
　　13 DeleteRegValue root_key subkey key_name
　　Deletes a registry value.
　　DeleteRegValue HKLM "Software\My Company\My Software" "some value"
　　14 EnumRegKey user_var(output) root_key subkey index
　　列舉所有的子鍵
　　Set user variable $x with the name of the 'index'th registry key in root_key\Subkey.
　　Returns an empty string if there are no more keys
　　15 EnumRegValue user_var(output) root_Key subkey index
　　列舉
　　16 ExpandEnvStrings user_var(output) string
　　Expands environment variables in string into the user variable $x,if an environment variable doesn't exist,it will not be
　　replaced. For example,if you use "%var%" and var doesn't exists,the result will be "%var"
　　ExpandEnvStrings $0 "WINDIR=%WINDIR%$\nTEMP=%TEMP%"
　　17 FlushINI ini_filename
　　Flushes the INI file's buffers
　　causes the changes to be written to the disk immediately
　　WriteINIStr $TEMP\something.ini test test test
　　FlushINI $TEMP\something.ini
　　18 ReadEnvStr user_var(output) name
　　Reads from te environment string "name" and sets the value into the user variable $x
　　ReadEnvStr $0 WINDIR
　　ReadEnvStr $1 TEMP
　　19 ReadINIStr user_var(output) ini_filename section_name entry_name