C / C++ / MFC

class Base
{
public:
	Base() {}
	~Base() {}
private:
	// whatever you want here
};

class Derived : public Base
{
public:
	Derived() {}
	~Derived() {}
private:
	int m_MyInt;
};

void main()
{
	Base* pB = new Derived;
	delete pB;	// memory leak
}

Wheatbread wrote:

CMyDriver * hUserDriver = (CMyDriver *)i_hIDriver;
hUserDriver->Destroy();
delete hUserDriver;
}

My app crashes at the 'delete hUserDriver'. EndDriver is an exposed interface call that another DLL calls to detroy the driver. hUserDriver->Destroy() destroy all internal structures of CDriver (not CMyDriver, as this function isnt overloaded in CMyDriver). CMyDriver is not referencing any objects destroyed by the Destroy call. Nothing is available in the debugger as its all assembly at that point.

Wheatbread wrote:

CMyDriver * hUserDriver = (CMyDriver *)i_hIDriver;

Michael Dunn wrote:

Subitems don't have their own states, only iItem is relevant for that notification.

WhiteSky wrote:

why you dont use from NM_CLICK

In OnClick function of CEditList, I added 
     NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
 
     Item =pNMListView->iItem;
     subItem =pNMListView->iSubItem;

void CXBudget::OnItemchangedXBudgetLISTMain(NMHDR* pNMHDR, LRESULT* pResult) 
{

	nitem = m_XBudgetLIST_Main.Item;
	nSubItem = m_XBudgetLIST_Main.subItem;
	if (nSubItem >=2)
	SaveChanges(nitem,nSubItem);
}