First you need to tell us how you want the answer to look, and what range of
data you have.

If the frames are always zero, you can use:

=substitute(a1,";",".")+substitute(b1,";",".")

and custom format as h:mm:ss";00"

If frames can be more than zero, tell us how you want them carried over to
seconds. Thirty frames per second?


--
Regards,
Fred


"Bridges TV" <Bridges wrote in message
...
These are the times for my programming library that I need to add. This is
hh:mm:ss;frame

please help