我错在哪？（帮帮）

[wangyi9778]

为什么我运行时出现error C2065: 'tItem' : undeclared identifier
error C2065: 'tcBuf' : undeclared identifier
tItem/tcBuf已经定义了，set和Get应该一致,为什么这样，错在哪？（关于列表控件）
for (tregi = tNListNum; tregi >= 0; tregi -= 2)
{
Time2Str(tcBuf,tpNListPtr[tregi],tpNListPtr[tregi+1]);
tItem = m_Ctrl_CommonRec.InsertItem(tItemNo++,tcBuf);
m_Ctrl_CommonRec.SetItemText(tItem,0,tcBuf);////////////////////
}
for (tregi = tAListNum; tregi >= 0; tregi -= 2)
{
Time2Str(tcBuf,tpAListPtr[tregi],tpAListPtr[tregi+1]);
tItem = m_Ctrl_AlarmRec.InsertItem(tItemNo++,tcBuf);
m_Ctrl_AlarmRec.SetItemText(tItem,0,tcBuf);
}
#endif
return TRUE;
}

void CListTable::OnOK()
{
POSITION pos;
CString Edit1;
UpdateData();
pos = m_Ctrl_CommonRec.GetFirstSelectedItemPosition();
Edit1=m_Ctrl_CommonRec.GetItemText(tItem,0,tcBuf);////////////
if (pos)
{
CDialog::OnOK();