xmbutton(parent, label, callback [, font,
[motif package] Creates a button widget in the
returns its widget id. A button widget consists of a raised rectangle
with a label on it. When the button is pressed, its appearance changes
from raised to depressed and back again.
label is the
button’s label (a string), and
callback the callback string
to be executed when the button is pressed. A
color (both strings) can also be specified.