A combo box is a combination of a list box and a text box.

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80
votes
16answers
16k views

Intuitive interface for Composing Boolean Logic?

I'm interested to know how people have, or would construct an interface which simplifies constructing logical boolean conditions? (Yes, it's a database query builder) In my mind a bad interface has ...
15
votes
4answers
19k views

Adding “Select…” as first option (placeholder) of dropdown list

Would it be considered a good practice to add the word "Select..." as the first option of a dropdown list? I think it's redundant and not at all necessary and what is in the dropdown list should be ...
5
votes
1answer
519 views

Guidelines for representing sentinel values within a list

I'm curious if anybody can point me to a list of guidelines (preferable regarding Windows Development UI design) that may help layout rules which to follow when representing sentinel or special values ...