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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

Header winuser.h
Windows Embedded CE Windows CE 1.0 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also

Reference

Combo Boxes Messages
SendMessage
CBN_DROPDOWN
CBN_SELCHANGE
WM_COMMAND