vb.net 2008: update listbox control from multiple sources

I need to update a listbox control from multiple sources.  What is the best way to do this to avoid 2 competing updates?
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dhenderson12Author Commented:
OK, I wasn't clear in my question.  I have 2 classes, each of which monitors a serial connection (com1 and com2).  I need to post the data from each serial port in a common listbox, so I'm concerned about "collision" and was wondering what the best way to do this.
One way is to use a Queue class. Both classes queue information to the queue and the main thread can dequeue the info and update UI.

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