How to create a Thread Handler

How can I create an array? of threads that are accessible from forms and classes within my application??

I am putting

Public thread_handler() As Thread

in my form and adding threads using

        Dim count As New Integer
        If thread_handler Is Nothing Then count = 0 Else count = UBound(thread_handler) + 1
        ReDim Preserve thread_handler(count)
        thread_handler(count) = t 'add thread to thread handler

but is this correct and is there a better way as I am having some problems with checking threads (where activex objects aren't returning information)  ie.

Error: COM object that has been separated from its underlying RCW cannot be used.

System.Runtime.InteropServices.InvalidComObjectException: COM object that has been separated from its underlying RCW cannot be used

and I think its because of the way I am handling them???

Thanks