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When to use
Label and Access
Always give list controls a label, positioned above or to the left of the list, in sentence capitalization. Provide an accelerator key in the label that allows the user to give focus directly to the list.
Size and Alignment
Make the list control large enough that it can show at least four items at a time without scrolling. For lists of ten or more items, increase this minimum size as appropriate.
If the list appears in a dialog or utility window, consider making the window and the list within it resizable so that the user can choose how many list items are visible at a time without scrolling. Each time the user opens this dialog, set its dimensions to those that the user last resized it to.