Basic Constants

Constants used in Basic programs

Boolean constants

Name

Type

Value

True

Boolean

1

False

Boolean

0


Eksempel:


            Dim bPositive as Boolean
            bPositive = True
        

Mathematical constant

Name

Type

Value

Pi

Double

3.14159265358979


Eksempel:


            Function Rad2Deg( aRad as Double) As Double
             Rad2Deg = aRad * 180.00 / Pi
            End Function
        

Object Constants

Name

Type

Usage

Empty

Variant

The Empty value indicates that the variable is not initialized.

Null

null

Indicates that the variable does not contain data.

Nothing

Object

Assign the Nothing object to a variable to remove a previous assignment.


Eksempel:


            SubExampleEmpty
                Dim sVar As Variant
                sVar = Empty
                Print IsEmpty(sVar) ' Returns True
            End Sub
            Sub ExampleNull
                Dim vVar As Variant
                MsgBox IsNull(vVar)
            End Sub
            Sub ExampleNothing
                Dim oDoc As Object
                Set oDoc = ThisComponent
                Print oDoc.Title
                oDoc = Nothing
                Print oDoc ' Error
            End Sub
        

MsgBox Named Constants

Navngitt konstant

Heltallsverdi

Definisjon

MB_OK

0

Vis bare OK-knappen.

MB_OKCANCEL

1

Vis knappene OK og Avbryt.

MB_ABORTRETRYIGNORE

2

Vis knappene Avbryt, Prøv igjen og Ignorer.

MB_YESNOCANCEL

3

Vis knappene Ja, Nei og Avbryt

MB_YESNO

4

Vis knappene Ja og Nei.

MB_RETRYCANCEL

5

Vis knappene Prøv igjen og Avbryt.

MB_ICONSTOP

16

Legg stopp-ikonet til i dialogen

MB_ICONQUESTION

32

Legg spørsmål-ikonet til i dialogen.

MB_ICONEXCLAMATION

48

Legg utropstegn-ikonet til i dialogen.

MB_ICONINFORMATION

64

Legg informasjons-ikonet til i dialogen..

128

Første knappen i dialogvinduet som standardknapp.

MB_DEFBUTTON2

256

Andre knappen i dialogvinduet som standardknapp.

MB_DEFBUTTON3

512

Tredje knappen i dialogvinduet som standardknapp.


GetAttr Named Constants

Named constant

Value

Definition

ATTR_NORMAL

0

Normal files.

ATTR_READONLY

1

Read-only files.

ATTR_HIDDEN

2

Hidden file

ATTR_SYSTEM

4

System file

ATTR_VOLUME

8

Returns the name of the volume

ATTR_DIRECTORY

16

Returns the name of the directory only.

ATTR_ARCHIVE

32

File was changed since last backup (Archive bit).


VarType Named Constants

keyword

Named constant

VarType

Variabeltyper

Boolean

11

Boolean variable

Byte

17

Byte variable

Date

V_DATE

7

Date variable

Currency

V_CURRENCY

6

Currency variable

Double

V_DOUBLE

5

Double floating point variable

Integer

V_INTEGER

2

Integer variable

Long

V_LONG

3

Long integer variable

Object

9

Object variable

Single

V_SINGLE

4

Single floating-point variable

String

V_STRING

8

Bruk av Variabler

Variant

12

Variant variable (can contain all types specified by the definition)

Empty

V_EMPTY

0

Variable is not initialized

Null

V_NULL

1

No valid data


Additional VBA constants

The following constants are available when VBA compatibility mode is enabled

warning

Denne konstanten, funksjonen eller objektet er aktivert med utsagnet Option VBASupport 1 plassert før den kjørbare programkoden i en modul.


VBA Color Named Constants

Named constant

Red, Green, Blue
composition

vbBlack

RGB(0, 0, 0)

vbBlue

RGB(0, 0, 255)

vbCyan

RGB(0, 255, 255)

vbGreen

RGB(0, 255, 0)

vbMagenta

RGB(255, 0, 255)

vbRed

RGB(255, 0, 0)

vbYellow

RGB(255, 255, 0)

vbWhite

RGB(255, 255, 255)


Variable Type Named Constants

Named constant

Decimal value

vbArray

8192

vbBoolean

11

vbByte

17

vbCurrency

6

vbDataObject

13

vbDate

7

vbDecimal

14

vbDouble

5

vbEmpty

0

vbError

10

vbInteger

2

vbLong

3

vbNull

1

vbObject

9

vbSingle

4

vbString

8

vbUserDefinedType

36

vbVariant

12


FormatDateTime VBA Named Constants

Named Constant

Value

Description

vbGeneralDate

0

Displays a date and/or time as defined in your system's General Date setting. If a date only, no time is displayed; If a time only, no date is displayed.

vbLongDate

1

Display a date using the long date format specified in your computer's regional settings.

vbShortDate

2

Display a date using the short date format specified in your computer's regional settings.

vbLongTime

3

Displays a time as defined in your system's Long Time settings.

vbShortTime

4

Display a time using the 24-hour format (hh:mm).


StrConv VBA Named Constants

Conversion

Value

Description

vbUpperCase

1

Converts Text characters to uppercase.

vbLowerCase

2

Converts Text characters lowercase.

vbProperCase

3

Converts the first letter of every word in Text to uppercase.

vbWide

4

Converts narrow (half-width) characters in Text to wide (full-width) characters.

vbNarrow

8

Converts wide (full-width) characters in Text to narrow (half-width) characters.

vbKatakana

16

Converts Hiragana characters in Text to Katakana characters.

vbHiragana

32

Converts Katakana characters in Text to Hiragana characters.

vbUnicode

64

Converts Text characters to Unicode characters using the default code page of the system.

vbFromUnicode

128

Converts Text characters from Unicode to the default code page of the system.


WeekDayName VBA Named Constants

Value

VBA Constant

Description

0

vbUseSystemDayOfWeek

Use system locale settings

1

vbSunday

Sunday (default)

2

vbMonday

Monday

3

vbTuesday

Tuesday

4

vbWednesday

Wednesday

5

vbThursday

Thursday

6

vbFriday

Friday

7

vbSaturday

Saturday


Miscellaneous VBA Named Constants

Named constant

Hexadecimal (decimal) value

Description

vbTrue

-1

Part of vbTriState enumeration.

vbFalse

0

Part of vbTriState enumeration.

vbUseDefault

-2

Part of vbTriState enumeration.

vbCr

\x0D (13)

CR - Carriage return

vbCrLf

\x0D\x0A (13 10)

CRLF - Carriage return and line feed

vbFormFeed

\x0c (12)

FF - Form feed

vbLf

\x0A (10)

LF - Line feed

vbNewLine

\x0D\x0A (13 10) for Windows

\x0A (10) for other systems

LF or CRLF

vbNullString

""

Null string

vbTab

\x09 (9)

HT - Horizontal tab

vbVerticalTab

\x0B (11)

VT - Vertical tab