Catching header messages in a CListView

Saturday Nov 21st 1998 by Justin Mitchell
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Catching header messages in a CListView

This is a quick tip, worked out by Linus Flueeler and myself. We were having problems catching header messages in a class dervied from CListView. The first thing we fixed were the macros produced by the class wizard, the autogenerated macros use the reflect mechanism which is not correct since the messages get sent to the header controls parent, which is the listview. So we changed the macros to use ON_NOTIFY, the id is 0 which is always the case for the header control in a listview control. Unfortunately this still didn't work. Since we are using NT but not ansi build we decided to try to catch the unicode messages, which did work. Below are the macros we used (we believe the ansi ones will be necessary for a program running on 95):
	ON_NOTIFY(HDN_BEGINTRACKW, 0, OnBeginTrack)
	ON_NOTIFY(HDN_ENDTRACKW, 0, OnEndTrack)
	ON_NOTIFY(HDN_BEGINTRACKA, 0, OnBeginTrack)
	ON_NOTIFY(HDN_ENDTRACKA, 0, OnEndTrack)

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