If you are using "invoke SendMessage,Hwnd,LVM_INSERTITEM,NULL,addr myLVITEM" the return value is -1 for an error and the index of the item if everything is ok.
So you can use "invoke SendMessage,Hwnd,LVM_SETITEMSTATE,index,addr myLVITEM" to focus and select this item.
read the "win32 api reference" Download
for more information.
Search for "List View Control Messages". I´ve not tested this example but i think it could work.
Or do you want that the listview is autoscrolling to to last inserted entry?