CBN_CLOSEUP notification code
Sent when the list box of a combo box has been closed. The parent window of the combo box receives this notification code through the WM_COMMAND message.
CBN_CLOSEUP WPARAM wParam; LPARAM lParam;
Handle to the combo box.
If the user changed the current selection, the combo box also sends the CBN_SELCHANGE notification code when the drop-down list closes. In general, you cannot predict the order in which notification codes will be sent. In particular, a CBN_SELCHANGE notification code may occur either before or after a CBN_CLOSEUP notification code.
To execute a specific process each time the user selects a list item, you can handle either the CBN_SELCHANGE or CBN_CLOSEUP notification code. Typically, you would wait for the CBN_CLOSEUP notification code before processing a change in the current selection. This can be particularly important if a significant amount of processing is required.
This notification code is not sent to a combo box that has the CBS_SIMPLE style.
|Minimum supported client
||Windows Vista [desktop apps only]
|Minimum supported server
||Windows Server 2003 [desktop apps only]