vcl-cxdropdownedit-dot-tcxcustomdropdownedit.md
Identifies if it is possible to invoke the drop-down window.
function CanDropDown: Boolean; virtual;
| Type | Description |
|---|---|
| Boolean |
True if the drop-down window open operation is available; otherwise, False.
|
Call CanDropDown and CanHide functions to identify if drop-down open and close operations are available.
The Properties.OnInitPopup event occurs every time a user attempts to invoke the drop-down window. If the CanDropDown function returns True, the OnPopup event also occurs and the drop-down window opens.
Note
TcxCustomDropDownEdit class descendants override the CanDropDown function to implement editor-specific drop-down window display permissions. You can display the drop-down window only if the CanDropDown function returns True.
This CanDropDown function implementation always returns False.
See Also
TcxCustomDropDownEdit.DropDown Procedure