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TBN_CUSTHELP

TBN_CUSTHELP 
    lpnmhdr = (LPNMHDR) lParam; 

Notifies a toolbar's parent window that the user has chosen the Help button in the Customize Toolbar dialog box. This message is sent in the form of a WM_NOTIFY message.

• No return value.

lpnmhdr

Address of an NMHDR structure that contains information about the notification message.

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