CBN_CLOSEUP

A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

This message is sent when the list box of a combo box has been closed. The parent window of the combo box receives this message through the WM_COMMAND message.

In general, you cannot predict the order in which messages will be sent. In particular, a CBN_SELCHANGE message may occur either before or after a CBN_CLOSEUP message.

Syntax

CBN_CLOSEUP idComboBox = (int)LOWORD(wParam); 
    hwndComboBox = (HWND) lParam;

Parameters

• idComboBox
  Identifier of the combo box.

• hwndComboBox
  Handle to the combo box.

Return Value

None.

Remarks

If the user changed the current selection, the combo box also sends the CBN_SELCHANGE message when the drop-down list closes. In general, you cannot predict the order in which messages will be sent. In particular, a CBN_SELCHANGE message may occur either before or after a CBN_CLOSEUP message.

To execute a specific process each time the user selects a list item, you can handle either the CBN_SELCHANGE or CBN_CLOSEUP message. Typically, you would wait for the CBN_CLOSEUP message before processing a change in the current selection. This can be particularly important if a significant amount of processing is required.

Requirements

See Also

Reference

Combo Boxes Messages
SendMessage
CBN_DROPDOWN
CBN_SELCHANGE
WM_COMMAND