Basic Constants

Constants used in Basic programs

Boolean constants

Namn	Typ	Värde
True	Boolean	1
False	Boolean	0

Exempel:


            Dim bPositive as Boolean
            bPositive = True

Mathematical constant

Namn	Typ	Värde
Pi	Double	3.14159265358979

Exempel:


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

Object Constants

Namn	Typ	Användning
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.

Exempel:


            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

Namngiven konstant	Heltalsvärde	Definition
MB_OK	0	Visa endast OK-knappen.
MB_OKCANCEL	1	Visa knapparna OK och Avbryt.
MB_ABORTRETRYIGNORE	2	Visa knapparna Avbryt, Upprepa och Ignorera.
MB_YESNOCANCEL	3	Visa knapparna Ja, Nej och Avbryt.
MB_YESNO	4	Visa knapparna Ja och Nej.
MB_RETRYCANCEL	5	Visa knapparna Upprepa och Avbryt.
MB_ICONSTOP	16	Lägg till Stoppikonen i dialogrutan.
MB_ICONQUESTION	32	Lägg till Frågeikonen i dialogrutan.
MB_ICONEXCLAMATION	48	Lägg till ikonen Utropstecken i dialogrutan.
MB_ICONINFORMATION	64	Lägg till Informationsikonen i dialogrutan.
	128	Första knappen i dialogrutan som standardknapp.
MB_DEFBUTTON2	256	Andra knappen i dialogrutan som standardknapp.
MB_DEFBUTTON3	512	Tredje knappen i dialogrutan som standardknapp.

GetAttr Named Constants

Namngiven konstant	Värde	Definition
ATTR_NORMAL	0	Normala filer.
ATTR_READONLY	1	Skrivskyddade filer.
ATTR_HIDDEN	2	Dold fil
ATTR_SYSTEM	4	Systemfil
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).

Data Type Named Constants

TypeName values	Named constant	VarType values	Variabeltyp
…()		8192	Array of variables
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-precision floating-point variable
Error		11	Error type variable
Integer	V_INTEGER	2	Integer variable
Long	V_LONG	3	Long integer variable
Object		9	Object variable
Single	V_SINGLE	4	Single-precision floating-point variable
String	V_STRING	8	String variable
Variant		12	Variant variable (can contain all types specified by the definition)
Empty	V_EMPTY	0	Uninitialized Variant variable
Null	V_NULL	1	Giltiga data saknas

Additional VBA constants

The following constants are available when VBA compatibility mode is enabled

This constant, function or object is enabled with the statement Option VBASupport 1 placed before the executable program code in a module.

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	Beskrivning
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