Topic |
Feature |
Syntax/Description/Examples |
Comments |
Put comments in your code |
Prefix with ' (aphostrophe) or Rem |
Array
|
Function to create an Array |
A = Array(10,20,30)
|
Declare an Array variable |
Eg. 1
Dim NameArray(9)
'Declares static array with 10 elements,
'LoweBound is 0
'Upperbound is 9
Dim Contacts(9,9)
'Declares 2 dimension array with 10x10 element
Eg. 3
Dim Names()
'Declare dynamic array
|
Test for an Array |
Dim MyArray(3)
MyArray(0) = "Sunday"
MyArray(1) = "Monday"
MyArray(2) = "Tuesday"
MyVariable = IsArray(MyArray) ' MyVariable contains "True"
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Get Lowest subscript for the Array |
E.g. for single dimension Array
LBound(MyArray)
' returns the lowest subscript of the 1st/only dimension of the array
E.g. for multi-dimention Array
LBound(MyArray,2)
' returns the lowest subscript for the 2nd dimension of the array
|
Get the highest subscript for the Array |
UBound(MyArray) returns the subscript of the last element of the array |
Functions
|
Conversion Functions |
CBool |
Converts an expression to a Boolean subtype. |
CByte |
Converts an expression to a Byte subtype. |
CCur |
Converts an expression to a Currency subtype. |
CDate |
Converts an expression to a Date subtype. |
CDbl |
Converts an expression to a Double subtype. |
CInt |
Converts an expression to a Integer subtype. |
CLng |
Converts an expression to a Long subtype. |
CSng |
Converts an expression to a Single subtype. |
CStr |
Converts an expression to a String subtype. |
|
Format Functions |
ormatCurrency |
Returns an expression formatted as a currency value. |
FormatDateTime |
Returns an expression formatted as a date or time. |
FormatNumber |
Returns an expression formatted as a number. |
FormatPercent |
Returns an expression formatted as a percent value with a trailing percent (%) symbol. |
|
String Functions |
Join |
Returns a string created by joining strings stored in an array. |
Filter |
Returns a zero-based array containing subset of a string array based on a filter criteria. |
InStr |
Returns the numeric position of the first occurrence of one string within another. |
InStrRev |
Returns the numeric position of the first occurrence of one string within another starting from the end of the string. |
LCase |
Returns a string with all its uppercase letters converted to lowercase letters. |
Left |
Returns a specified number of characters from the left side of a string. |
Len |
Returns the number of characters in a string. |
LTrim |
Removes all the spaces from the left side of a string. |
RTrim |
Removes all the spaces from the right side of a string. |
Trim |
Removes spaces from both the left and the right sides of a string. |
Mid |
Returns a specified number of characters from a string. |
Replace |
Returns a string in which a specified sub-string has been replaced with another substring a specified number of times. |
Right |
Returns a specified number of characters from the right side of a string. |
Space |
Returns a string consisting of the number of defined spaces. |
Split |
Returns a zero-based, one-dimensional array that contains a specified number of substrings. |
StrComp |
Compares two strings and returns a value indicating the result of the comparison. |
String |
Returns a string consisting of character repeated number times. |
StrReverse |
Returns a string where the character order has been reversed. |
UCase |
Returns string with all its lowercase letters converted to uppercase letters. |
|
Math Functions |
Abs |
Returns the absolute value of a number. |
Atn |
Returns the arctangent of a number. |
Cos |
Returns the cosine of an angle. |
Exp |
Returns e, the base of natural logarithms, raised to a power. |
Hex |
Returns a string representing the hexadecimal value of a number. |
Int |
Returns the integer portion of a number. If number is negative, Int returns the first integer less than or equal to number. |
Fix |
Returns the integer portion of a number. If number is negative, Fix returns the first integer greater than or equal to number. |
Log |
Returns the natural logarithm of a number. |
Oct |
Returns a string representing the octal value of a number. |
Rnd |
Returns a random number less than 1 but greater or equal to 0. |
Round |
Returns a number rounded to a specified number of decimal places. |
Sgn |
Returns an integer indicating the sign of a number. |
Sin |
Returns the sine of an angle. |
Sqr |
Returns the square root of a number. |
|
Date Functions |
Date |
Returns the current system date. |
DateAdd |
Returns a date to which a specified time interval has been added. |
DateDiff |
Returns the number of intervals between two dates. |
DatePart |
Returns the specified part of a given date. |
DateSerial |
Returns a date for a specified year, month, and day. |
DateValue |
Returns a date. |
Day |
Returns a number representing the day of the month (between 1 and 31, inclusive). |
Hour |
Returns a number representing the hour of the day (between 0 and 23, inclusive). |
Minute |
Returns a number of the minutes in current system time (between 0 and 59, inclusive). |
Month |
Returns a number representing the month of the year (between 1 and 12, inclusive). |
MonthName |
Returns the name of a specified month. |
Now |
Returns the current system date and time. |
Second |
Returns the current seconds value of the current system time (between 0 and 59, inclusive). |
Time |
Returns the current system time. |
TimeSerial |
Returns the time for a specific hour, minute, and second. |
TimeValue |
Returns the current system time. |
Weekday |
Returns a number representing the day of the week (between 1 and 7, inclusive). |
WeekdayName |
Returns the weekday name of a specified day of the week. |
Year |
Returns a number representing the year. |
|
Type checking Functions |
VarType |
Returns an integer code that indicates the subtype of a variable. |
TypeName |
Returns the subtype of a variable. |
IsNumeric |
Returns a Boolean value indicating whether an expression can be evaluated as a number. |
IsArray |
Returns a Boolean value indicating whether a variable is an array. |
IsDate |
Returns a Boolean value indicating whether the expression can be converted to a date. |
IsEmpty |
Returns a Boolean value indicating whether a variable has been initialized or not. |
IsNull |
Returns a Boolean value that indicates whether an expression contains no valid datatype. |
IsObject |
Returns a Boolean value indicating whether an expression refers to an Automation object. |
|
Other Functions |
Chr |
Returns the character specified by the ANSI character code. |
Asc |
Returns the ANSI character code of a string. |
|
Variables |
Assigning values to variables |
Numeric
A = 200
B = 99.9
Date or Time
CutoffDate = #06/18/2008#
CutoffTime = #3:36:00 PM#
String
Name = "VBScript"
|
Contants |
Declaring Constants |
Const MyString = "This is my string"
Const MyAge = 49
Const CutoffDate = #06/18/2008#
Const CutoffTime = #3:36:00 PM#
|
Operators
|
Arithmetic Operators |
|
Comparison Operators |
|
Logical Operators |
|
Conditional Statements
|
If .. Then .. Else |
' Block syntax:
If condition Then
[statements]
[ElseIf condition-n Then
[elseifstatements]] . . .
[Else
[elsestatements]]
End If
Single-Line syntax:
If condition Then statements [Else elsestatements ]
Multi-line example
dim count
count = 0
If count = 0 Then
MsgBox "There are no items."
ElseIf count = 1 Then
MsgBox "There is 1 item."
Else
MsgBox "There are " & count & " items."
End If
Single line example
If A > 10 Then A = A + 1 : B = B + A : C = C + B
|
Select .. Case |
Select Case testexpression
[Case expressionlist-n
[statements-n]] . . .
[Case Else
[elsestatements-n]]
End Select
Example
Dim Color, MyVar
Sub ChangeBackground (Color)
MyVar = lcase (Color)
Select Case MyVar
Case "red" document.bgColor = "red"
Case "green" document.bgColor = "green"
Case "blue" document.bgColor = "blue"
Case Else MsgBox "pick another color"
End Select
End Sub
|
Loop |
Do .. Loop |
Example 1
Sub ChkFirstWhile()
Dim counter, myNum
counter = 0
myNum = 20
Do While myNum > 10
myNum = myNum - 1
counter = counter + 1
Loop
MsgBox "The loop made " & counter & " repetitions."
End Sub
Example 2
Sub ChkLastWhile()
Dim counter, myNum
counter = 0
myNum = 9
Do
myNum = myNum - 1
counter = counter + 1
Loop While myNum > 10
MsgBox "The loop made " & counter & " repetitions."
End Sub
Example 3
Sub ChkFirstUntil()
Dim counter, myNum
counter = 0
myNum = 20
Do Until myNum = 10
myNum = myNum - 1
counter = counter + 1
Loop
MsgBox "The loop made " & counter & " repetitions."
End Sub
Example 4
Sub ChkLastUntil()
Dim counter, myNum
counter = 0
myNum = 1
Do
myNum = myNum + 1
counter = counter + 1
Loop Until myNum = 10
MsgBox "The loop made " & counter & " repetitions."
End Sub
|
While .. Wend |
|
For .. Next |
Example 1
Sub DoMyProc50Times()
Dim x
For x = 1 To 50
MyProc
Next
End Sub
Example 2
Sub TwosTotal()
Dim j, total
For j = 2 To 10 Step 2
total = total + j
Next
MsgBox "The total is " & total
End Sub
Example 3
Sub NewTotal()
Dim myNum, total
For myNum = 16 To 2 Step -2
total = total + myNum
Next
MsgBox "The total is " & total
End Sub
|
For each .. Next |
Sub cmdChange_OnClick
Dim d 'Create a variable
Set d = CreateObject("Scripting.Dictionary")
d.Add "0", "Athens" 'Add some keys and items
d.Add "1", "Belgrade"
d.Add "2", "Cairo"
For Each I in d
Document.frmForm.Elements(I).Value = D.Item(I)
Next
End Sub
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