I would like to  write a wizard for mach3. how and where to look?
 some say;  there is a how-to in mach2 folder; can not find it.
 any examples anywhere?
 any suggestions ?

....     joe

The Mach2 customization guide has info on creating wizards.

thanks Gerry; you are a wealth of info.

..... joe

is the source code of any of the wizards .i.e cut circle;  available?
are the wizards propriety or open-source?

.... joe

Open the wizard, click Operator > Edit Button Script, and click the buttons, and the script editor should open and show you the code in the buttons.

A wizard is really just a screenset. You create it with a screen designer, and add code just like in a screenset.

There is so much to learn. This is like pealing an onion. all I want to do is a few simple   procedures
I am going to be a perpetual student.

....  joe

I am going to be a perpetual student.

Yep. 

(I've been using Mach2/3 for 10 years and still learning).

Tweakie.

You should strive to always be learning.
CNC is my day job, and even after 20 years, I learn new things all the time.