How a scrolling menu control can be created (usually in a form)?

By using the select (menu control), option (an option within a menu) elements.

• Scrolling menus (more than one selection can be made when the multiple attribute is present):
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<select name="varName" size="4" multiple> <!-- The size attribute indicates the size of the selection box in number of lines -->
    <option value="EBTG">Everything but the girl</option>
    <option>Aerosmith</option>
    <option>The Cure</option>
    <option>UB-40</option>
    <option selected>Daft Punk</option>
    <option value="GunsNRoses">Guns'n Roses</option>
</select>