NMHEADERNMHEADER*
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NMHEADER


typedef struct tagNMHEADER{
    NMHDR    hdr;
    int      iItem;
    int      iButton;
    HDITEM  FAR* pitem;
} NMHEADER, FAR* LPNMHEADER;

Contains information about header control notification messages. This structure supersedes the HD_NOTIFY structure.

hdr
NMHDR structure that contains information about the notification message.
iItem
Zero-based index of the header item that is the focus of the notification message.
iButton
Value specifying the index of the mouse button used to generate the notification message. This member can be one of the following values:
0 Left button
1 Right button
2 Middle button
pitem
Address of an HDITEM structure containing information specific to the item indicated by iItem.

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