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Basic Object assigning problem (Byval not working)

Posted on 2004-04-07
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Last Modified: 2010-04-17
Dear All,

I have Obj1 and Obj2 as objects of class1. When I access these 2 objects independently it works fine but when I say set Obj1=Obj2 it gets assigned by REF. So when I can Obj1's property Obj2's property also gets set.

Now I dont want this so I have written an function which accepts parameters as BYVAL and returns the objects which I again assigns to Obj1. Eg.


Function AssignByVal (Byval vdata as Object) as Object
   set AssignByVal = vdata
end sub

But this not works. It only works when I assign byval using piece - by piece method.
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Question by:Shaileng
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4 Comments
 

Accepted Solution

by:
Doknjas earned 25 total points
ID: 10780799
When you set an object reference to another object, both references point to the same object.  If you want to return a copy, then you have to do that yourself by implementing your own copy constructors - serialization will simplify this.

Passing the original object ByVal just ensures that the original object reference will not be pointing elsewhere after the method returns to the calling method.
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Assisted Solution

by:Éric Moreau
Éric Moreau earned 25 total points
ID: 10782829
You need to implement a Clone method. See an article I wrote on the subject: http://www.utmag.com/July2003/Page8.asp
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