add widget element by code

Hi all,
I hope that this post is not OT ...


I want know how to add dynamically some widget (textform, button,
check, ....) in a window.
I know how design a GUI with InterfaceBuilder, but I don't have finded
a "code method" for build an Interface without tools (or mixed).


somebody know do***netation that can ilustrate some example about
this ?



thanks and sorry for my orrible english