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;
Parameters
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wParam
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The LOWORD contains the control identifier of the combo box. The HIWORD specifies the notification code.
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lParam
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Handle to the combo box.
Remarks
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.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista [desktop apps only] |
| Minimum supported server |
Windows Server 2003 [desktop apps only] |
| Header |
|
See also
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Reference
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Other Resources