| title | MessageHandler | Microsoft Docs | |
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| ms.custom | ||
| ms.date | 11/04/2016 | |
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| ms.topic | reference | |
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| ms.assetid | 8a0acf97-1b0d-4226-91b9-75446634a03c | |
| author | mikeblome | |
| ms.author | mblome | |
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MessageHandler is the name of the function identified by the second parameter of the MESSAGE_HANDLER macro in your message map.
LRESULT MessageHandler(
UINT uMsg,
WPARAM wParam,
LPARAM lParam,
BOOL& bHandled);
uMsg
Specifies the message.
wParam
Additional message-specific information.
lParam
Additional message-specific information.
bHandled
The message map sets bHandled to TRUE before MessageHandler is called. If MessageHandler does not fully handle the message, it should set bHandled to FALSE to indicate the message needs further processing.
The result of message processing. 0 if successful.
For an example of using this message handler in a message map, see MESSAGE_HANDLER.