# Keyword Reference

# $tagNMHEADER

Contains information about control notification messages

Global Const $tagNMHEADER = $tagNMHDR & ";int Item;int Button;ptr pItem"

## Parameters

$tagNMHDR | Contains information about a notification message
Item | 0-based index of the control to which this structure refers
Button | 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 | Optional pointer to a tagHDITEM structure containing information about the item specified by Item. The mask member of the tagHDITEM structure indicates which of its members are valid.