Appendix D Visual Basic Constants Supported in VBScript

This appendix is primarily aimed at the Visual Basic programmer who wants to make the jump into VBScript. This appendix covers all of the Visual Basic constants that are supported in VBScript. Constants are useful in script because they allow us to use a specific value without explicitlyreak writing it.

Color Constants

These constants are used within script code to specify particular colors.

Constant Value Description

VbBlack

&h00

Black

VbRed

&Hff

Red

VbGreen

&hFF00

Green

VbYellow

&hFFFF

Yellow

VbBlue

&hFF0000

Blue

VbMagenta

&hFF00FF

Magenta

VbCyan

&hFFFF00

Cyan

VbWhite

&hFFFFFF

White


Comparison Constants

These constants are used to switch between binary or textual comparisons.

Constant Value Description

VbBinaryCompare

Perform a binary comparison

VbTextCompare

1

Perform a textual comparison

VbSunday

1

Sunday

VbMonday

2

Monday

VbTuesday

3

Tuesday

VbWednesday

4

Wednesday

VbThursday

5

Thursday

VbFriday

6

Friday

VbSaturday

7

Saturday

vbUseSystemDayOfWeek

Use the day of the week specified for your computer as the first day of the week.

vbFirstJan1

1

Use the week in which January 1 occurs as the first week of the year (this is the default)

VbFirstFourDays

2

Use the week that has at least 4 days in the new year

VbFirstFullWeek

3

Use the first full week of the year


Date Format Constants

These constants determine how a date is displayed.

Constant Value Description

VbGeneralDate

Displays a date and/or time. The format is determined by your system settings.

VbLongDate

1

Display a date using your system's long date format.

VbShortDate

2

Display a date using your systems short date format.

VbLongTime

3

Display a time using your system's long time format.

VbShortTime

4

Display a time using your system's short time format.


Miscellaneous Constants

Constant Value Description

VbObjectError

2147221504

Used as the base for user -defined error numbers .


MsgBox Constants

These constants specify which buttons and icons appear on the message box, and which button is the default. Some of the constants are also used to determine the modality of the MsgBox .

Constant Value Description

VbOKOnly

Display the OK button only.

VbOKCancel

1

Display the OK and Cancel buttons.

VbAbortRetryIgnore

2

Display the Abort , Retry , and Ignore buttons.

VbYesNoCancel

3

Display the Yes , No , and Cancel buttons

VbYesNo

4

Display the Yes and No buttons.

VbRetryCancel

5

Display the Retry and Cancel buttons.

VbCritical

16

Display the Critical Message icon.

VbQuestion

32

Display the Warning Query icon.

VbExclamation

48

Display the Warning Message icon.

VbInformation

64

Display the Information Message icon.

VbDefaultButton1

The first displayed button is the default.

VbDefaultButton2

256

The second displayed button is the default.

VbDefaultButton3

512 &

The third displayed button is the default.

VbDefaultButton4

768

The fourth displayed button is the default.

VbApplicationModal

The user must respond to the message box.

VbSystemModal

4096

The user must respond to the message box. The message box is always on top in all other windows .

The following determine which MsgBox button the user has selected. These constants must be explicitly declared within your code before they can be used.

Constant Value Description

VbOK

1

The OK button was clicked.

VbCancel

2

The Cancel button was clicked.

VbAbort

3

The Abort button was clicked.

VbRetry

4

The Retry button was clicked.

VbIgnore

5

The Ignore button was clicked.

VbYes

6

The Yes button was clicked.

VbNo

7

The No button was clicked.


String Constants

These constants allow for the convenient insertion of nonvisible characters into strings.

Constant Value Description

VbCr

Chr(13)

Carriage return.

VbCrLf

Chr(13) & Chr(10)

Carriage return and linefeed combination.

VbFormFeed

Chr(12)

Form feed. This is not useful from within Windows applications.

VbLf

Chr(10)

Line feed.

VbNewLine

Chr(13) Chr(10) or Chr(10)

Platform-specific newline character.

VbNullChar

Chr(0)

Character having the value .

VbNullString

String having value

Not the same as a zero-length string (' ---" ). This is used for calling external procedures.

VbTab

Chr(9)

Horizontal tab.

VbVerticalTab

Chr(11)

Vertical tab. This is not useful from within Windows applications.


Tristate Constants

These constants are used to switch arguments on or off, or to use the default setting.

Constant Value Description

TristateUseDefault

-2

Use default from computer's regional settings

TristateTrue

-1

True

TristateFalse

False


VarType Constants

The VarType constants are used to determine the subtype of a Variant . These constants must be explicitly declared within your code before they can be used.

Constant Value Description

VbEmpty

Uninitialized (this is the default)

VbNull

1

Contains no valid data

VbInteger

2

Integer subtype

VbLong

3

Long subtype

VbSingle

4

Single subtype

VbDouble

5

Double subtype

VbCurrency

6

Currency subtype

VbDate

7

Date subtype

VbString

8

String subtype

VbObject

9

Object

VbError

10

Error subtype

VbBoolean

11

Boolean subtype

VbVariant

12

Variant (used only for arrays of Variants)

VbDataObject

13

Data access object

vbDecimal

14

Decimal subtype

vbByte

17

Byte subtype

vbArray

8192

Array




VBScript Programmer's Reference
VBScript Programmers Reference
ISBN: 0470168080
EAN: 2147483647
Year: 2003
Pages: 242

Similar book on Amazon

Flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net