类CMyListCtrl在类CListCtrl基础上添加了AddTableColumns（添加列）功能 并添加了对任意一个单元格作为文本编辑框或者combox下拉框的功能-category CMyListCtrl in CListCtrl category on the basis of added AddTabl eColumns (added out) and add a function to arbitrary cells as a text edit box or comb ox