radiobutton - новая команда в смартах Allplan 2013.
I_RADIOBUTTON generates a radio button in a group of multiple radio buttons. Groups of radio button are defined by the parameter name. Items in the same group are mutually exclusive.
Syntax
I_RADIOBUTTON name, value, text, x, y, width, height
Parameters
name (string): name of parameter, optionally with index value, if array.
value: value to which the parameter name is set when radio button is clicked.
text (string): text which is displayed besides the radio button.
x,y (integer, > 0): the position of the radio button in pixel.
width, height (integer, > 0): width and height of the radio button in pixels.
Ссылку на документацию написали выше.