in these code : ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ m_StaticText.SetWindowText(_T("try lang = ")+ count); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ you can not add a string value to a integer value.

Thank you! I just know where are you come from? :)

Each item in the list box has a bind data( set with the func 'SetItemData') , if I delete the item which who's index is 7(based zero), so now , is the new 7 indexed item has the last eighth item's data or seventh 's data ?