Extract substring from string

[bigbang]

i have a small console program that shows you, your ip and resolves from your ip your host name(reverse dns) and display then your ip and host name
to the screen.
an example output:

IP: 12.34.567.89
Host Name: dslb-012-034-567-089.pools.myisp-ip.net

now i want to convert the

dslb-012-034-567-089.pools.myisp-ip.net

to

dslb.pools.myisp-ip.net

or something similar.
my goal is to remove the numbers and the "-" character from the host name string, because my ip is a dynamic ip and it changes every
24hrs automatically. it should start to find the first "-" character and from there, until the first "." character or last
number in the host name string and then cut out the found unneeded characters and then display the final host name string without the ip and
the "-" character.
i'm using msvc++ as compiler.

how would i do that?

any help and hints are more than welcome.