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CBN_CLOSEUP (Compact 2013)

  • Article

3/28/2014

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

See Also

Reference

Combo Box Messages
SendMessage
CBN_DROPDOWN
CBN_SELCHANGE
WM_COMMAND