Deciduous. Deciduous means falling off at maturity or tending to fall off, and is typically used in reference to trees or shrubs that lose their leaves seasonally, and to the shedding of other plant structures such as petals after flowering or fruit when ripe.
A combo box is a text box with a list box attached. This type of control enables users to select a predefined value in a list or type their own value in the text box portion of the control. The list is hidden until the user clicks the arrow next to the box.
In a simple combo box, the system sends the CBN_DBLCLK notification code when the user double-clicks a list item. In a drop-down combo box or drop-down list, a single click hides the list, so it is not possible to double-click an item. Drop-down Lists. Certain notifications and messages apply only to combo boxes containing drop-down lists.