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Hej NG.

I mange funktioner bruges der "ByVal <varname> As <vartype>" - hvad gør
ByVal, og hvorfor bruger man den?

Hilsen Mathias

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"Mathias" <mathias@nonne.tld> wrote in message
news:Xns945F96EC38CFA5q738hgq@212.54.64.134...
> Hej NG.
>
> I mange funktioner bruges der "ByVal <varname> As <vartype>" - hvad gør
> ByVal, og hvorfor bruger man den?
>

Alternativet til ByVal er ByRef. Se

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcn7/html/vaconArgPassMechanism.asp

for forklaring og kode eksemper.

mvh
Reidar Kind

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Hei Mathias

Sub Main()
Dim L As Long
L = 10
MsgBox "L is " & L
Call One(L)
MsgBox "L is " & L
Call Two(L)
MsgBox "L is " & L
End Sub

Sub One(ByRef X As Long)
X = X * 2
MsgBox "One says " & X
End Sub

Sub Two(ByVal X As Long)
X = X * 2
MsgBox "Two says " & X
End Sub

--
HTH. Beste hilsen Harald
Followup to newsgroup only please

"Mathias" <mathias@nonne.tld> skrev i melding
news:Xns945F96EC38CFA5q738hgq@212.54.64.134...
> Hej NG.
>
> I mange funktioner bruges der "ByVal <varname> As <vartype>" - hvad gør
> ByVal, og hvorfor bruger man den?
>
> Hilsen Mathias