wm-clear.md

title	description	ms.assetid	keywords	topic_type	api_name	api_location	api_type	ms.topic	ms.date
WM_CLEAR message (Winuser.h)	An application sends a WM\_CLEAR message to an edit control or combo box to delete (clear) the current selection, if any, from the edit control.	6730a725-01ec-4821-9ffc-1ea267d665b3	WM_CLEAR message Data Exchange	apiref	WM_CLEAR	Winuser.h	HeaderDef	reference	05/31/2018

WM_CLEAR message

An application sends a WM_CLEAR message to an edit control or combo box to delete (clear) the current selection, if any, from the edit control.

#define WM_CLEAR                        0x0303

Parameters

wParam

This parameter is not used and must be zero.

lParam

This parameter is not used and must be zero.

Return value

This message does not return a value.

Remarks

The deletion performed by the WM_CLEAR message can be undone by sending the edit control an EM_UNDO message.

To delete the current selection and place the deleted content on the clipboard, use the WM_CUT message.

When sent to a combo box, the WM_CLEAR message is handled by its edit control. This message has no effect when sent to a combo box with the CBS_DROPDOWNLIST style.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	Winuser.h (include Windows.h)

See also

Reference

WM_COPY

WM_CUT

WM_PASTE

WM_UNDO

Conceptual

Clipboard