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NM_RCLICK vs. WM_RBUTTONDOWN

Posted on 1998-05-13
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Last Modified: 2013-11-20
Is there any advantage to handling one message over the other.  I felt that the NM_* messages were more suitable for common controls, but I am not sure.  Is there a technical advantage of one over the other?  I am aware that some of the message handlers provide different additional data (points vs. NMHDR struct), but again I want to know if I get more bang for my buck (speed, performance, etc.) with one over the other.  Thanks.

PS: Although I may be guessing, I feel that handling NM_* messages is slower, but I have not benchmarked this.
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Question by:falkland
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jstolan earned 200 total points
ID: 1310345
The purpose of the WM_NOTIFY messages such as NM_RCLICK is for a control to notify it's parent that a user has clicked on the control.  If the parent is a dialog, for example, it never sees a WM_RBUTTONDOWN message because the event occurred in the child window (the control).

Conversely, if the user clicks on the dialog, the dialog gets the WM_RBUTTONDOWN message but not the NM_RCLICK message.

So you see, the meaning of these messages are quite different, and they should be handled differently.  They are not interchangeable.
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