Here is an example of a simple Answering Machine Application using the XTEL.DLL from Planet Source Code. Hopefully this will give you the information you need. Without more info I can't really tell what you want.
You should be able to open up the .frm file with a text editor like notepad and copy the code to your VB4 code window.
Since this is an answering machine app, I suspect it will only contain code for answering calls, not making them. I haven't used the xtel.dll control in any of my apps before, but if you look in the object browser you can see the methods and events for the xtel.dll.
There is a method called MakeCall and one called SendDTMF that should be used for making a call.