change gui properties with codes not on inspector manually

I have an existing gui fig, but i want to change some properties like fontsize, fontname with command lines since they are too many panels or edit_text. I mean if it's possible to get the handle of an opening gui? like this:

 handle_mygui = get(0,'mygui'); %it's definitely wrong
 set(handle1_mygui.mytag.fontsize,10);

has anybody tried this? or give some hints?

Answer 1

[Walter Roberson]

If you are using GUIDE, then none of the Create* callbacks will have access to the handles structure, but the GUI OpenFcn callback will be passed the handles structure

Answer 2

[tye huo]

The "property inspector" always pop up as i click on objects like 'fig'. I have not found a way to suppress it.