检测CListCtrl列的大小调整

Question

I have a pretty simple dialog containing basically a CListCtrl in report mode with several columns and with a header.

Now I need to detect when the user has resized a column and I hoped that OnHdnChanged would be called each time the user has resized a column.

Amoungst others I have this in my message map, IDC_LIST1 being the id of the list control.

ON_NOTIFY(LVN_ITEMCHANGED, IDC_LIST1, OnItemchangedList)
ON_NOTIFY(HDN_ENDTRACKW, IDC_LIST1, OnHdnChanged)

OnHdnChanged function:

void CMyDlg::OnHdnChanged(NMHDR* pNMHDR, LRESULT* pResult)
{
  ...
  *pResult = 0;
}

void CSanDlg::OnItemchangedList(NMHDR* pNMHDR, LRESULT* pResult)
{
  ...

OnItemchangedList is called when exepected, but OnHdnChanged is not. I supposed OnHdnChanged is not called because the header control's parent is not my dialog but it's the list control.

Does anybody know what I can do?

Answer 1

I was just looking at this old article , which suggests changing the ON_NOTIFY to ON_NOTIFY(HDN_ENDTRACKW, 0, OnHdnChanged) , since the control ID of the header control seems always to be 0.

I don't know if that's still true, but it's worth checking.

---

Edit: Updating based on responding comment. Here 's another suggestion I came across, which is subclassing the CListCtrl and handling the notification there. Presumably that handler could delegate actual handling logic to its parent.