NMHDRNMHDR*
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NMHDR


typedef struct tagNMHDR { 
    HWND hwndFrom; 
    UINT idFrom; 
    UINT code; 
} NMHDR; 

Contains information about a notification message.

hwndFrom
Window handle to the control sending a message.
idFrom
Identifier of the control sending a message.
code
Notification code. This member can be a control-specific notification code or it can be one of the common notification codes.

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