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Elaorating on Arhay's post, you can also make sure your WaitForSingleObject() has a short timeout, in in the timeout case test for state variables being set, that would let you take the next course...

I'm not sure what you mean by "simulate" a treeview control, but from your description it sounds like you are trying to ACCESS an existing control from Is it possible that you inadvertently have...

Thanks OReuben.

It is certainly a driver issue, and the only reason I'm bothering with it is because the PCI card that causes the issue was needed by a lot of my work colleagues, who also need my...

OK, so a lot of these links speak of this same code block, except the one that references using CreateFile() as a test, which I already know is problematic. First of all, as a point of interest, ...

Thanks Victor! I'll try some of these, and I'll be sure to post whether it solves the problem. One of these methods should suffice to reading whether serial ports are there. And if they report ports...

this really has nothing to do with a C++ problem, but I see it as a bug in the API, and I'm looking for an alliterative. I need to deal with serial ports a LOT, and of course the first step in...