whereis GTK+, glitz, glkglext?

You can use Synaptic Package Manager to make sure you have all the required dependencies. System -> Administration -> Synaptic Package Manager. You can then install all the dependencies you need from there. This [1] provides a more in depth tutorial of Synaptic if you need it.

[1] https://help.ubuntu.com/community/SynapticHowto

On Fri, 2010-03-05 at 06:39 +0000, Gabe Gorelick wrote:
> Your question #103243 on evolution in ubuntu changed:
> https://answers.edge.launchpad.net/ubuntu/+source/evolution/+question/103243
>
> Status: Open => Answered
>
> Gabe Gorelick proposed the following answer:
> You can use Synaptic Package Manager to make sure you have all the
> required dependencies. System -> Administration -> Synaptic Package
> Manager. You can then install all the dependencies you need from there.
> This [1] provides a more in depth tutorial of Synaptic if you need it.
>
> [1] https://help.ubuntu.com/community/SynapticHowto
>

I think that I expressed myself badly with my initial question.

My real question is why does the program give me the error message when
I try to lauch it:

lee@COYOTE:~/z88130_32$ z88com

z88com: error while loading shared libraries: libgtkglext-x11-1.0.so.0:
cannot open shared object file: No such file or directory

I assumed that it was because I did not have the required libraries
installed so I used the Synaptic Package Manager to try to find the
packages that contained the libraries but I don't know how to find what
package they might be in. The HOWTO helped me be able to navigate the
package manager but did not answer the question. (You have probably
guessed by now that I am very, very new at this!).

The README file is short so I have copied it here:

"Installation of the ready-to-run Z88 package z88130_32.tar.gz (32 bit)
and z88130_64.tar.gz (64 bit) especially for Ubuntu (other distributions
should work, too) :

1) Be shure to have the browser Firefox and the editor Gedit installed.
The GTK+,glitz and gtkglext libraries are required, too. All well-known
distributions feature this programs and libraries. Install, if
necessary.
2) Unpack Z88 in your home directory for 32 bit PCs: tar -xvzf
z88130_32.tar.gz
2) Unpack Z88 in your home directory for 64 bit PCs: tar -xvzf
z88130_64.tar.gz
   This will establish a directory z88130_32 or z88130_64.
3) Edit the file /etc/ld.so.conf and add this new directory (for
example: /home/johndoe/z88130_32)
   by a new line:
   sudo gedit /etc/ld.so.conf
4) Launch the system command ldconfig:
   sudo ldconfig
5) Open a shell and enter (or, better, edit .profile or .bashrc and
enter):
   LANG=C
   export LANG
   PATH=$PATH:. (mind the dot after the colon!)
   export PATH
   logoff and login again
6) Launch Z88 in the new Z88 directory with the command z88com"

I deleted everything and re-installed to make sure that I was following
the instructions carefully but still get the same error. I don't know
what to try next.

Yes, it looks like you got that error message because you do not have all the necessary packages installed. Gtk+, Firefox, and gedit you should already have installed on a default installation of Ubuntu. For the other ones, just searching the name of the libraries (glitz and glkglext) in Synaptic gives you a lot of choices. You probably just need libgtkglext1 and libglitz1, but you can just install all the packages that seem relevant until it works.