What is ByVal? (ok ok i'm not pro but i need the answer)

[casparas]

So What is ByVal?

I'm just beginer in VB so i know practicaly nothing in it.

By the way thanks for everyone who answered my previous posts and who will answer this one.

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-casparas

novice programer
[email protected]

[Aaron Young]

ByVal means To Pass By Value, meaning you you pass something ByVal you are passing the Value of the Variable not a Pointer to the Variable itself, ie.

Private Sub Command1_Click()
    Dim iTemp As Integer
    iTemp = 2
    Call Add2(iTemp)
    Debug.Print iTemp
End Sub

Private Sub Add2(ByVal X As Integer)
    X = X + 2
End Sub

Calling this code would always Print "2" in the Debug Window.

If you modify the Add2 Routine to be ByReference, it would Print "4".


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Aaron Young
Analyst Programmer
[email protected]
[email protected]

[Roger Eagans]

One other thing to note. ByRef is the VB default way of passing variable. If you don't specify, it will be ByRef.

Roger Eagans