CoCreateInstance in COM

[vibin_nair]

Hi all,
I just had a question in my mind .. regarding
CoCreateInstance in COM.
Suppose i have a command button which calls
CoCreateinstance on a particular Dll each time it is clicked.
Now suppose i click the button 10 times , then what
happens. Do i have 10 insances of the Dll in my process or
a single Dll with 10 reference counts on it .
- vibin

[crptcblade]

You have 10 instances of the object you've created. You only increase the reference counter when you set one variable equal to an existing object. Such as...

Dim o As Object, o2 As Object
 
  '** Two separate instances
  Set o = CreateObject("VB.Label")
  Set o2 = CreateObject("VB.Label")
  
  '** One instance, two references
  Set o = CreateObject("VB.Label")
  Set o2 = o

In the second one, the memory taken up by the created object is not eligible for garbage collection until both variables are set to Nothing, or they fall out of scope.