Re: How to prevent item changed in a CListCtrl?

I use MFC Visual C++ 4.2.

I have a CListCtrl in a Detailed View.
Below the CListCtrl there are a few CEdits to display the value of each
column.
So it's kind of the data form.

I need to do like this:
If users has changed one of the CEdits BUT they haven't save the data and
they want to change the selected item of the CListCtrl to other item, a
confirmation message will appear to ask if the data they have been changed
to
be saved or not.

There are 3 options:
Yes: the data change is saved and the current focus is on the item user
desired.
No : the data change is NOT saved and the current focus is on the item
user
desired.
Cancel: the data change is NOT saved and the current focus is STILL on the
OLD item which is FIRST focused.

I have tried the OnItemChange or OnItemChanging and I have the No option
worked.

If I test Yes / Cancel, the messagebox will show 2-3 times then it return.

Thank you very much.

Here is my code:
void CToiawaseDlg::OnItemchangedLstData(NMHDR* pNMHDR, LRESULT* pResult)
{
int iIndex = pNMListView->iItem;
if( iIndex != -1 ){
NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
if( m_bDetailChanged && !m_bUpdateBtnClicked ){
int iDlgResult = MessageBox( "Save data?", "Confirm", MB_YESNOCANCEL |
MB_ICONQUESTION);
if( iDlgResult == IDYES )
AfxMessageBox( "Yes" );
else if( iDlgResult == IDCANCEL ){
m_lst_data.SetItemState( iIndex, LVIS_SELECTED, LVIS_SELECTED );
m_lst_data.EnsureVisible( iIndex, FALSE );
*pResult = 1;
}
m_bDetailChanged = FALSE;
}
   }
}