VBScript Commands and Functions

7/31/2019 VBScript Commands and Functions

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Loquehayadespusdecomillaseignora

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ARRAYSANDVARIABLES

indexnumber(0-length)Variablescanhavealocal(functionsandsubs)orglobal(mainbody)scope

OptionExplicit Thisshowsanerrormessageifyouuseavariablewithoutdeclaringitbefore.

Dimvar(length) (itcanbedeclaredwithoutaspecificlength)ReDim[preserve]varname(subscripts) (ifit'swrittenpreserve,previousvarnamevaluesaresaved)

public/privatevar1,var2,... Youcanexplicitlydeclareglobal/localvariablesbywrittingthis

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DATATYPES

Numeric Integer,Double

String ""Date #1/3/2002# #January3,2001# #3January,2001# #January3,200122:30:10#Time #22:30:10# #10:30:10PM#Boolean

AUTOMATICCONVERSION

Number+or- StringIfthestringrepresentsanumber,itisconvertedtoanumberandtheresultisanumber.Otherwise,theprogramstopswithanerrormessageDate/time+or-NumberThewhole(integer)partofthenumberisaddedtothed

ateasanumberofdays.Anyfractionalpartofthenumberisaddedasatimeoffset,asafractionofaday.Date+or- StringIfthestringrepresentsanumber,itisconvertedtoanumberandtheresultisadate.Otherwise,anerroroccurs.Anything&Anything Valuesofanytypeareconvertedtostrings,andthestringsareconcatenated.

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CONSTANTS

constvariable=value variablenopuedecambiaralolargodelprograma

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OPERATORS

Notequaltois Objectequivalence& Stringconcatenation(anytypeofvalue)(sometimes+canalsobeused)Mod Modulus>= Greaterthanorequal

not Negationnot (3=4)-True

and Conjunction (3=4)and(3


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FUNCTIONS

Ifwearen'tusingthevaluewhichafunctionisgoingtogiveus,oriffunctiondoesn'tneedanyargument -> wedon'tneedtowriteparentheses

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[PROCEDURES:FUNCTIONSANDSUBROUTINES(subroutinesdoesn'treturnvalues)]

functionname(arguments)statementsendfunctionsubname(arguments)statementsendsub

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[DATEANDTIME]

Date()andTime() ThedateisstoredasanintegernumberofdayssinceJanuary1,0099,andtimesarestoredasdecimalfractionsofaday(1secondequals0.0000115741)Youcanoperatethemasintegers.DateAdd(interval,number,date) ItaddstimetoagivendateDateDif(interval,date1,date2) Itgivesthenumberof"interval"betweentwodatesDay(date) Thedayofthemonthofthegivendatefrom1to31.Weekday(date) Thedayoftheweekofthegivendateasanumberfrom1to7,where1equalsSunday,2equalsMonday,andsoon.

Month(date) Themonthofthegivendate,where1equalsJanuaryandsoon.WeekdayName(date) Thedayoftheweekofdateasastring.MonthName(date) Thenameofthemonthinwhichdatefalls.Hour(time) Thehour(0to23)ofthegiventime.Minute(time) Theminute(0to59)ofthegiventime.Second(time) Thesecond(0to59)ofthegiventime.Date(time) Withanargument,Datereturnsjustthedatepartofadate/timevalue,effectively,midnightofthespecifieddate.(Withoutanargument,Datereturnstodaysdate).Time(time) Withanargument,Timereturnsjustthetimepartofadate/timevalue.(Withoutanargument,Timereturnsthecurrentt

ime).Now() Currentdate-time

-Interval-

YYYYYears MMonths DDays NMinutesQQuarters WWeeks HHours SSeconds


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[STRING-MANIPULATION]

InStr(n,filename,.DAT) 0ifthereisnothingbefore".DAT"andit'sthenumberofcharacterwhere".DAT"startsifthereisit(WithTEST.DAT,itwouldgiveus5)Thisfunctioniscasesensitive.Itstartssearchingfromcharn.InStrRev(ABCABC,AB) Itdoesthesameasbeforebutstartingthesearchfromtheright

Len(string) ThelengthofstringincharactersLcase(string) lowercaseUcase(string) uppercaseTrim(string) leadingandtrailingspacesremovedLtrim(string) leadingspacesremovedRtrim(string) trailingspacesremoved

-Extractingcharacters-

Left(string,length) TheleftmostlengthcharactersfromstringRight(string,length) TherightmostlengthcharactersfromstringMid(string,start) ThatpartofstringfromcharacterpositionstartonwardMid(string,start,length) lengthcharactersofstringfrompositionstart

-Convertingstring-

cstr(value) Astringrepresentationofvalue.clng(value) stringtoalong(32-bit)integer.

cdbl(value) toadouble-precisionfloatingpointvalue.cdate(value) toadate-timevalue.chr(value) Returnsaone-characterstringcontaingthecharactercorrespondingtotheintegerASCIIvalue.asc(string) ReturnstheASCIIvalueofthefirstcharacterinthestring.

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[I/O]

-MsgBox-

MsgBox("msg",buttons(+type),title) Scriptsecuencedoesn'tworkuntilyouclickthebutton

BUTTONS:


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VbOKOnly 0 OKbuttonVbOKCancel 1 OKandCancelbuttonsVbAbortRetryIgnore 2 Abort,Retry,andIgnorebuttonsVbYesNoCancel 3 Yes,No,andCancelbuttonsVbYesNo 4 YesandNobuttonsVbRetryCancel 5 RetryandCancelbuttons

TYPE:

VBCritical 16 CriticalMessageiconVBQuestion 32 QuestioniconVbExclamation 48 ExclamationiconVBInformation 64 Informationicon

RETURN:

VbOK 1VbCancel 2VbAbort 3vbRetry 4vbIgnore 5VbYes 6VbNo 7

-InputBox-

InputBox(msg,title,defaultinbox) Valuegivenbyusercanbeusedeithernumberorstring

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ERRORHANDLING

onerrorresumenext Fileisexecuteddespiteerrors(secondtimeitiswrittenitrestoresdefaultbehaviour(stopsifthereissomeerror))

err.numbererr.description

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VBScript Commands and Functions