win32 listctrl控件右键菜单的实现

HMENU Menu_list,Menu_all;
POINT point;
HINSTANCE hInstance;
//下面代码放到BOOL WINAPI DialogProc下
case WM_CONTEXTMENU:
            if((HWND)wParam == GetDlgItem(hWnd,IDC_LIST_VIEW))
            {
                Menu_all=GetSubMenu(Menu_list,0);
                GetCursorPos(&point);//得到鼠标当前坐标，
                TrackPopupMenu(Menu_all,TPM_LEFTBUTTON,point.x,point.y,0,hWnd,NULL);
            }            
            break;
//下面的代码放到void OnCommand函数里
        case ID_CLA:
            SendMessage(hWndlist, LVM_DELETEALLITEMS, 0, 0);
            i=0;
            break;
        case ID_DEL:
            {
                LVITEM item; 
                item.iItem = SendMessage(hWndlist, LVM_GETNEXTITEM, -1, LVNI_SELECTED);
                SendMessage(hWndlist,LVM_DELETEITEM,item.iItem,0);
                i--;
            }
            break;