API:Vcl.ComCtrls.TCustomComboBoxEx
Delphi
TCustomComboBoxEx = class(TCustomCombo)
C++
class PASCALIMPLEMENTATION TCustomComboBoxEx : public Vcl::Stdctrls::TCustomCombo
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| class | public | Vcl.ComCtrls.pas Vcl.ComCtrls.hpp |
Vcl.ComCtrls | Vcl.ComCtrls |
Description
TCustomCombo is the base class for all combo boxes.
Vcl.ComCtrls.TCustomComboBoxEx inherits from Vcl.StdCtrls.TCustomCombo. All content below this line refers to Vcl.StdCtrls.TCustomCombo.
TCustomCombo is the base class for all combo boxes.
Use TCustomCombo as a base class when defining a control that represents a specialized combo box. A combo box is an edit box with a scrollable list attached to it; users can select an item from the list or type directly into the edit box. Combo boxes can present the list as a drop-down list or as a list box that is always visible.
Typically, combo box classes do not descend directly from TCustomCombo. Rather, they descend from one of TCustomCombo's descendants, TCustomComboBox or TCustomComboBoxEx. Use TCustomCombo as a base class for a simple combo box, or TCustomComboBoxEx as a base class for a combo box that supports the extended combo box features such as images on the list entries.
Do not create instances of TCustomCombo. To put a combo box in a form, use a descendant of TCustomCombo, such as TComboBox or TComboBoxEx.