CListControl

[Gregory64]

Hi,
I've inherited CMyListCtrl from, CListCtrl amd I'm tiring to process
notification message from header control that it was clicked.
I’ve subclassed CListControl with CMyListCtrl in dialog, but I never got into this notification message. Property noheadersort do not checked.
What am I doing wrong.
Any help really appreciated.


BEGIN_MESSAGE_MAP(CMyListCtrl , CListCtrl)
//{{AFX_MSG_MAP(CMyListCtrl )
ON_NOTIFY_REFLECT(HDN_ITEMCLICK, OnItemclick)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

void CSortListCtrl::OnItemclick(NMHDR* pNMHDR, LRESULT* pResult)
{
HD_NOTIFY *phdn = (HD_NOTIFY *) pNMHDR;
.............
*pResult = 0;
}

[Sam Hobbs]

Was the list control created in the view's OnCreate or is it a list control created in a dialog (either for a dialog or for a form)?



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[Gregory64]

It is list control for dialog or form.
In that certan case it is in dialog

[peterchen]

Ahh... the dreaded header Control again...
First, the header is a child window of the list, so ON_NOTIFY_REFLECT is bad... the Clazz Wizard generates wrong code here.

Change the Message Map Entries to
ON_NOTIFY(HDN_xxx, IDC_yyyy, OnEndtrackList1)

For the IDC_yyy, the header control _typically_ uses 0 as dlg ctrl id.

Good luck
Peter

[Sam Hobbs]

I think it is strange that there is not a KB article describing this. I looked for one and could not find one. I did find a description of the problem and solution in a different KB article that is remotely related.

http://support.microsoft.com/support.../Q250/6/14.ASP

However I tried it in one of my projects I use for trying things in and it does not work for me. Maybe there is something simple I am overlooking but if so then it probably is not obvious.



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[Gregory64]

Thank you for respond.
I've changed my code as below, but it still doesn't work for me.
What is wromg ?

BEGIN_MESSAGE_MAP(CMyListCtrl, CListCtrl)
//{{AFX_MSG_MAP(CMyListCtrl)
ON_NOTIFY(HDN_ITEMCLICK, 0,OnItemclick)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

void CMyListCtrl::OnItemclick(NMHDR* pNMHDR, LRESULT* pResult)
{
HD_NOTIFY *phdn = (HD_NOTIFY *) pNMHDR;
// TODO: Add your control notification handler code here

*pResult = 0;
}

[Gregory64]

Hello Sam,
Just let you know, if you still interesting in this problem, that I found solution.
ON_NOTIFY(HDN_ITEMCLICKW, 0,OnItemclick) instead of
ON_NOTIFY(HDN_ITEMCLICK, 0,OnItemclick) works. Only one letter but big difference :-).

Best Regards

[Sam Hobbs]

Then the list control probably was created in an OnCreate and if so you should have said so when I asked.

See: http://support.microsoft.com/support.../Q148/5/33.ASP

Windows 9X will not send a HDN_ITEMCLICKW message. Perhaps it will work to have another message map entry for the HDN_ITEMCLICKA message but if it were me I would use a more generalized solution. Note that one easy solution is simply to not create controls in OnCreate. There are other possibilities too.



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[Gregory64]

This control was not created in OnCreate. It just subclassed standart CListControl which was created by resource editor and it works on Windows 98 as well as on NT. I do not test it on 95.

[Sam Hobbs]

The HDN_ITEMCLICKW notification message is a Unicode message and Windows 9X does not use Unicode notification messages. The HDN_ITEMCLICKW notification message will not be sent by Windows 9X.

There must be an explanation for why NT is erroneously sending your program Unicode notification messages.



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[Gregory64]

Probably you right theoretically.
But I have to believe to my eyes. This do work on Windows 98.