用listctrl出现的错误(在线急等）

[Jerffsan]

当退出时出现的错误如下：
Buffer overrun detected!
program: ...\Release\FoodDeptV2.0.exe
A buffer overrun has been detected which has corrupted the program's
internal state. The program cannot safely continue execution and must now
be terminated.

当我运用CMyExListCtrl m_list时出现上述错误，但是CListCtrl m_list时则没有错误；
而且当我新建项目运用CMyExListCtrl m_list时，没有错误发生。
并且我用断点调试没有发现错误发生之处？请各位赐教！

[doudouHuY]

CMyExListCtrl 构造函数有问题？
上代码

[Jerffsan]

CMyExListCtrl代码如下：
#include "stdafx.h"
#include "MyExListCtrl.h"
#include ".\myexlistctrl.h"


// CMyExListCtrl

IMPLEMENT_DYNAMIC(CMyExListCtrl, CListCtrl)
CMyExListCtrl::CMyExListCtrl()
: nItem(0)
, nSubItem(0)
, m_ItemClicked(0)
{
}

CMyExListCtrl::~CMyExListCtrl()
{
}


BEGIN_MESSAGE_MAP(CMyExListCtrl, CListCtrl)
ON_NOTIFY_REFLECT(NM_CLICK, OnNMClick)
ON_NOTIFY_REFLECT(NM_DBLCLK, OnNMDblclk)
ON_WM_CHAR()
END_MESSAGE_MAP()



// CMyExListCtrl 消息处理程序

CString CMyExListCtrl::GetItemText(HWND hWnd, int nItem , int nSubItem)
{
LVITEM lvi;
memset(&lvi, 0, sizeof(LVITEM));
lvi.iSubItem = nSubItem;
CString str;
int nLen = 128;
int nRes;
do
{
nLen *= 2;
lvi.cchTextMax = nLen;
lvi.pszText = str.GetBufferSetLength(nLen);
nRes = (int)::SendMessage(hWnd, LVM_GETITEMTEXT, (WPARAM)nItem,(LPARAM)&lvi);
//nRes = (int) ::SendMessage(hWnd,LVM_GETITEMTEXT,(WPARAM)&lvi,(LPARAM)nItem);
} while (nRes == nLen-1);
str.ReleaseBuffer();
return str;
}

void CMyExListCtrl::OnNMClick(NMHDR *pNMHDR, LRESULT *pResult)
{
// TODO: 在此添加控件通知处理程序代码
LPNMLISTVIEW temp1 = (LPNMLISTVIEW)pNMHDR;
CString str = this->GetItemText(nItem,nSubItem);
CString str1 ;
if (m_ceEdit.GetSafeHwnd() != NULL)
{
m_ceEdit.GetWindowText(str1);
if ( str.Compare(str1) != 0)
SetItemText(nItem,nSubItem,str1);
m_ceEdit.DestroyWindow();
}

m_ItemClicked = temp1->iItem ;


*pResult = 0;
}

void CMyExListCtrl::OnNMDblclk(NMHDR *pNMHDR, LRESULT *pResult)
{
LPNMITEMACTIVATE temp = (LPNMITEMACTIVATE)pNMHDR;
HWND hWnd = this->GetSafeHwnd();
nItem = temp->iItem;
nSubItem = temp->iSubItem ;
CString str = GetItemText(hWnd,nItem,nSubItem);
if ( nItem == -1 || nSubItem == -1 || nSubItem == 0)
return ;
CRect rect;
if (!GetSubItemRect(nItem,nSubItem,LVIR_BOUNDS,rect))
return ;
m_ceEdit.Create(WS_VISIBLE | WS_CHILD | WS_BORDER | ES_LEFT | ES_AUTOHSCROLL,rect,this,1);
m_ceEdit.SetFont(this->GetFont());

m_ceEdit.SetFocus();
m_ceEdit.SetWindowText(str);

*pResult = 0;
}

CString CMyExListCtrl::GetItemText(int nItem,int nSubItem)
{
return CListCtrl::GetItemText(nItem,nSubItem);
}

[Jerffsan]

各位知道什么原因吗？

[ripyu]

看代码好像没 什么问题