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OlimilO

Intermediate

Posts: 277

Location: Germany

Occupation: software engineer

1

Saturday, January 24th 2009, 2:11pm

difference between ByVal, ByRef, ByJava

Hello,

in Java it is not possible to return a variables value by calling it ByRef in a function definition.

in VB6 wehn using ByRef there will be passed a pointer to the variable to the calling stack.

in Jabaco what is the difference between declaring a variable

in a function-definition ByVal, ByRef, ByJava?

Jabaco Source

 
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Public Sub Command1_Click()
   
   Dim i As Integer
   
   Call ReturnInteger(i)
   MsgBox i
   
   Call ReturnIntegerByRef(i)
   MsgBox i
   
   Dim ii(0 To 0) As Integer
   Call ReturnIntegerByJava(ii)
   MsgBox ii(0)
   
End Sub
Public Sub Command2_Click()
   
   Dim v As Variant
   
   Call ReturnVariant(v)
   MsgBox v
   Call ReturnVariantByRef(v)
   MsgBox v
   
' not possible
'   Dim vv(0 To 0) As Variant
'   Call ReturnVariantByJava(vv)
'   MsgBox vv(0)
'   
End Sub


Jabaco Source

 
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Public Sub ReturnInteger(IntVal As Integer)
    IntVal = 10
End Sub
Public Sub ReturnIntegerByRef(ByRef IntVal As Integer)
    IntVal = 10
End Sub
Public Sub ReturnIntegerByJava(ByJava IntVal() As Integer)
    IntVal(0) = 10
End Sub
Public Sub ReturnVariant(VarVal As Variant)
    VarVal = 10
End Sub
Public Sub ReturnVariantByRef(ByRef VarVal As Variant)
    VarVal = 10
End Sub
Public Sub ReturnVariantByJava(Byjava VarVal() As Variant)
    VarVal(0) = 10
End Sub


greetings

+Oliver

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