HDN_ITEMCHANGING (Compact 2013)

3/28/2014

This message notifies a header control parent window the header item attributes are about to change. It is sent in the form of a WM_NOTIFY message.

Syntax

HDN_ITEMCHANGING phdr = (HD_NOTIFY FAR *) lParam;

Parameters

• phdr
  Pointer to an NMHEADER structure that contains data about the header control and the header item, including the attributes about to change.

Return Value

TRUE prevents the changes. FALSE accepts the changes.

Requirements

See Also

Reference

Header Controls Notifications
HDM_SETITEM
WM_NOTIFY