[Overview][Types][Classes][Procedures and functions][Index] | Reference for unit 'ComboEx' (#lcl)

# TCustomCheckCombo.DropDown

Displays the drop down for the combo-box.

## Declaration

Source position: comboex.pas line 301

`protected procedure TCustomCheckCombo.DropDown; override;`

## Description

DropDown is an overridden method used to display the drop down for the combo-box if it is not already visible. DropDown calls the inherited method to trigger the OnDropDown method (when assigned). When the drop down is already visible, the value in an enabled at ItemIndex is Toggled.

## See also

TCustomCheckCombo.ItemEnabled |  | Provides indexed access to the Boolean enabled value for a check box defined in Items.
TCustomCheckCombo.Toggle |  | Toggles the checked state for the check box at the specified position.
TCustomComboBox.ItemIndex |  | The index of the currently selected item, or -1 if no item is selected.
TCustomComboBox.DropDown |  | Signals the OnDropDown event handler.
TCustomComboBox.OnDropDown |  | Handler invoked when the list has dropped down.