Listbox Select items with Keyboard.

Hi,
I have a listbox whose RowSource is changed depending on which command button is clicked. I have been able to transfer the focus from the command button to the listbox as the command button is clicked, however, I can’t seem to find a way to select items from the listbox using just the keyboard, selecting with the mouse works just fine but I would like to make it keyboard friendly.
I have tried changing the ListStyle and every key combo I can think of. I’m beginning to think it might not be possible. I need some help from the experts.

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Thank you. That was exactly what I was looking for, the keystrokes to select items. The listbox works fine using the arrow keys and the spacebar for selecting items from the list.
I think my question had a bit too much unneeded information. Thanks again for the response and the two links for me to study.