Finding window name

[Softselect]

Hi everyone
I am trying to pass some info to excel
Excel must be open and the cursor in the starting cell
I want to pass eg. 12.005 plus a Enter character Chr(13) to move to the next cell
I have used Dzt usefull library dzHW-3 and changed the test program and i have partial sucsess
dz.bringwindowTo Front needs the the name to be spot on
if i use dz.BringWindowToFront("Microsoft Excel - Book1")
then it works
but if I change the file name in excel it no longer works.
so
how would i use
r = FindWindowLike(hWnds(), 0, "Microsoft Excel*", "XLMAIN", Null)
to find the correct name for the window, when the file name Book1 changes
and
how do I pass enter (chr(13)) i get an error when i try
error= input string was not in correct format
I have looked at Winuser.h and it may as well be writen in some strange language, because I simply don't understand it at all.

Please can someone help
thanks Friedrich