- 介绍
- 特别声明（Special Announcement）
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- 常见问题解答 (FAQ)
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- 脚本编辑器
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- AutoIt 窗口信息工具
- 窗口标题与文本（基础篇）
- 窗口标题与文本（高级篇）
- Controls
- Intended Use
- AutoIt v2 用户须知
- 指南 - HelloWorld
- 指南 - 记事本（Notepad）
- 指南 - WinZip
- Language Reference
- Language Reference - Datatypes
- Language Reference - Variables
- Language Reference - Macros
- Language Reference - Operators
- Language Reference - Conditional Statements
- Language Reference - Loops Statements
- Language Reference - User Functions
- Language Reference - Comments
- GUI Reference
- GUI Reference - MessageLoop Mode
- GUI 相关 - OnEvent 模式
- Keywords
- Keyword #comments-start
- Keyword #include
- Keyword #include-once
- Keyword #NoTrayIcon
- Keyword Dim / Global / Local / Const
- Keyword ContinueLoop
- Keyword Do...Until
- Keyword Exit
- Keyword ExitLoop
- Keyword For...Next
- Keyword Func...Return...EndFunc
- Keyword If...Then
- Keyword If...ElseIf...Else...EndIf
- Keyword ReDim
- Keyword Select...Case...EndSelect
- Keyword While...WEnd
- Macros
- 宏列表－AutoIt相关
- Macro Reference - Directory
- Macro Reference - System Info
- Macro Reference - Time And Date
- 函数（Functions）
- 使用函数时的注意事项
- Function ClipGet
- Function ClipPut
- Function EnvGet
- Function EnvSet
- Function EnvUpdate
- Function MemGetStats
- Function DirCopy
- Function DirCreate
- Function DirGetSize
- Function DirMove
- Function DirRemove
- Function DriveGetDrive
- Function DriveGetFileSystem
- Function DriveGetLabel
- Function DriveGetSerial
- Function DriveGetType
- Function DriveMapAdd
- Function DriveMapDel
- Function DriveMapGet
- Function DriveSetLabel
- Function DriveSpaceFree
- Function DriveSpaceTotal
- Function DriveStatus
- Function FileChangeDir
- Function FileClose
- Function FileCopy
- Function FileCreateShortcut
- Function FileDelete
- Function FileExists
- Function FileFindFirstFile
- Function FileFindNextFile
- Function FileGetAttrib
- Function FileGetLongName
- Function FileGetShortcut
- Function FileGetShortName
- Function FileGetSize
- Function FileGetTime
- Function FileGetVersion
- Function FileInstall
- Function FileMove
- Function FileOpen
- Function FileOpenDialog
- Function FileRead
- Function FileReadLine
- Function FileRecycle
- Function FileRecycleEmpty
- Function FileSaveDialog
- Function FileSelectFolder
- Function FileSetAttrib
- Function FileSetTime
- Function FileWrite
- Function FileWriteLine
- Function IniDelete
- Function IniRead
- Function IniReadSection
- Function IniReadSectionNames
- Function IniWrite
- Function AutoItSetOption
- Function PixelChecksum
- Function PixelGetColor
- Function PixelSearch
- Function SoundPlay
- Function SoundSetWaveVolume
- GUI Reference
- Function GUICreate
- Functions
- Function GUICtrlCreateAvi
- Function GUICtrlCreateButton
- Function GUICtrlCreateCheckbox
- Function GUICtrlCreateCombo
- Function GUICtrlCreateContextMenu
- Function GUICtrlCreateDate
- Function GUICtrlCreateDummy
- Function GUICtrlCreateEdit
- Function GUICtrlCreateGroup
- Function GUICtrlCreateIcon
- Function GUICtrlCreateInput
- Function GUICtrlCreateLabel
- Function GUICtrlCreateList
- Function GUICtrlCreateListView
- Function GUICtrlCreateListViewItem
- Function GUICtrlCreateMenu
- Function GUICtrlCreateMenuitem
- Function GUICtrlCreatePic
- Function GUICtrlCreateProgress
- Function GUICtrlCreateRadio
- Function GUICtrlCreateSlider
- Function GUICtrlCreateTab
- Function GUICtrlCreateTabItem
- Function GUICtrlCreateTreeView
- Function GUICtrlCreateTreeViewItem
- Function GUICtrlCreateUpdown
- Function GUICtrlDelete
- Functions
- Function GUICtrlSetBkColor
- Function GUICtrlSetColor
- Function GUICtrlSetCursor
- Function GUICtrlSetData
- Function GUICtrlSetFont
- Function GUICtrlSetImage
- Function GUICtrlSetLimit
- Function GUICtrlSetOnEvent
- Function GUICtrlSetPos
- Function GUICtrlSetResizing
- Function GUICtrlSetState
- Function GUICtrlSetStyle
- Function GUICtrlSetTip
- Functions
- Function GUISetBkColor
- Function GUISetCoord
- Function GUISetCursor
- Function GUISetFont
- Function GUISetHelp
- Function GUISetIcon
- Function GUISetOnEvent
- Function GUISetState
- Function GUIDelete
- Function GUICtrlGetState
- Function GUICtrlRead
- Function GUICtrlRecvMsg
- Function GUICtrlSendMsg
- Function GUICtrlSendToDummy
- Function GUIGetCursorInfo
- Function GUIGetMsg
- Function GUIStartGroup
- Function GUISwitch
- Function HotKeySet
- Function Send
- Function Abs
- Function ACos
- Function ASin
- Function ATan
- Function BitAND
- Function BitNOT
- Function BitOR
- Function BitShift
- Function BitXOR
- Function Cos
- Function Exp
- Function Log
- Function Mod
- Function Random
- Function Round
- Function Sin
- Function Sqrt
- Function Tan
- Function InputBox
- Function MsgBox
- Function ProgressOff
- Function ProgressOn
- Function ProgressSet
- Function SplashImageOn
- Function SplashOff
- Function SplashTextOn
- Function ToolTip
- Function TrayTip
- Function AdlibDisable
- Function AdlibEnable
- Function AutoItSetOption
- Function AutoItWinGetTitle
- Function AutoItWinSetTitle
- Function BlockInput
- Function Break
- Function Call
- Function CDTray
- Function ConsoleWrite
- Function SetError
- Function SetExtended
- Function MouseClick
- Function MouseClickDrag
- Function MouseDown
- Function MouseGetCursor
- Function MouseGetPos
- Function MouseMove
- Function MouseUp
- Function MouseWheel
- Function FtpSetProxy
- Function HttpSetProxy
- Function InetGet
- Function InetGetSize
- Function Ping
- Function DllCall
- Function DllClose
- Function DllOpen
- Function ProcessClose
- Function ProcessExists
- Function ProcessSetPriority
- Function ProcessList
- Function ProcessWait
- Function ProcessWaitClose
- Function Run
- Function RunAsSet
- Function RunWait
- Function Shutdown
- Function RegDelete
- Function RegEnumKey
- Function RegEnumVal
- Function RegRead
- Function RegWrite
- Function StringAddCR
- Function StringInStr
- Function StringIsAlNum
- Function StringIsAlpha
- Function StringIsASCII
- Function StringIsDigit
- Function StringIsFloat
- Function StringFormat
- Function StringIsInt
- Function StringIsLower
- Function StringIsSpace
- Function StringIsUpper
- Function StringIsXDigit
- Function StringLeft
- Function StringLen
- Function StringLower
- Function StringMid
- Function StringReplace
- Function StringRight
- Function StringSplit
- Function StringStripCR
- Function StringStripWS
- Function StringTrimLeft
- Function StringTrimRight
- Function StringUpper
- Function Sleep
- Function TimerInit
- Function TimerDiff
- Function Asc
- Function Chr
- Function Assign
- Function Dec
- Function Eval
- Function Hex
- Function Int
- Function IsAdmin
- Function IsArray
- Function IsDeclared
- Function IsFloat
- Function IsInt
- Function IsNumber
- Function IsString
- Function Number
- Function String
- Function UBound
- Function ControlClick
- Function ControlCommand
- Function ControlDisable
- Function ControlEnable
- Function ControlFocus
- Function ControlGetFocus
- Function ControlGetHandle
- Function ControlGetPos
- Function ControlGetText
- Function ControlHide
- Function ControlListView
- Function ControlMove
- Function ControlSend
- Function ControlSetText
- Function ControlShow
- Function StatusbarGetText
- Function WinActivate
- Function WinActive
- Function WinClose
- Function WinExists
- Function WinGetCaretPos
- Function WinGetClassList
- Function WinGetClientSize
- Function WinGetHandle
- Function WinGetPos
- Function WinGetProcess
- Function WinGetState
- Function WinGetText
- Function WinGetTitle
- Function WinKill
- Function WinList
- Function WinMenuSelectItem
- Function WinMinimizeAll
- Function WinMinimizeAllUndo
- Function WinMove
- Function WinSetOnTop
- Function WinSetState
- Function WinSetTitle
- Function WinSetTrans
- Function WinWait
- Function WinWaitActive
- Function WinWaitClose
- Function WinWaitNotActive
- User Defined Functions
- 自定义函数的注意事项（Function Notes）
- Function _ArrayAdd
- Function _ArrayBinarySearch
- Function _ArrayCreate
- Function _ArrayDelete
- Function _ArrayDisplay
- Function _ArrayInsert
- Function _ArrayMax
- Function _ArrayMaxIndex
- Function _ArrayMin
- Function _ArrayMinIndex
- Function _ArrayPop
- Function _ArrayReverse
- Function _ArraySort
- Function _ArraySwap
- Function _ArrayToClip
- Function _ArrayToString
- Function _ArrayTrim
- Function _ColorGetBlue
- Function _ColorGetGreen
- Function _ColorGetRed
- Function _DateAdd
- Function _DateDayOfWeek
- Function _DateDaysInMonth
- Function _DateDiff
- Function _DateIsLeapYear
- Function _DateIsValid
- Function _DateTimeFormat
- Function _DateToDayValue
- Function _DateToDayOfWeek
- Function _DateToDayValue
- Function _DayValueToDate
- Function _Now
- Function _NowCalc
- Function _NowCalcDate
- Function _NowDate
- Function _NowTime
- Function _TicksToTime
- Function _TimeToTicks
- Function _FileCountLines
- Function _FileCreate
- Function _FileReadToArray
- Function _FileWriteLog
- Function _TempFile
- Function _GetIP
- Function _INetExplorerCapable
- Function _INetMail
- Function _Ceil
- Function _Floor
- Function _MathCheckDiv
- Function _Max
- Function _Min
- Function _Iif
- Function _RunDos
- Function _HexToString
- Function _StringEncrypt
- Function _StringProper
- Function _StringRepeat
- Function _StringReverse
- Function _StringToHex
- Function _viOpen
- Function _viExecCommand
- Function _viFindGpib
- Function _viGpibBusReset
- Function _viGTL
- Function _viOpen
- Function _viSetAttribute
- Function _viSetTimeout
- Language Reference
- ASCII Characters
- CLSID List
- Standard Windows Fonts
- 标准 Windows 字体
- Language Codes
- Send 命令的可用按键列表
文章来源于网络收集而来，版权归原创者所有，如有侵权请及时联系！
Function IsDeclared
IsDeclared
检测某个变量是否已声明。
IsDeclared ( 表达式 )
参数
| 表达式 | 目标变量/表达式。 |
返回值
| 成功： | 返回值为1，说明该变量为全局变量或在函数外部声明的变量。 |
| 特殊： | -1，说明该变量为局部变量。 |
| 失败： | 返回值为0，说明未发现目标变量。 |
注意
无相关
Eval示例
If Not IsDeclared ("a") then
MsgBox(0,"", "$a 尚未声明") ; $a 还未被赋值
EndIf
$a=1
If IsDeclared ("a") then
MsgBox(0,"", "$a 已声明" ) ; 前面的 $a=1 赋值操作即为声明
EndIf
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