Extracted from Pike v8.0 release 358 as of 2016-11-23.
   

Method GTK2.Button()->set_use_underline()


Method set_use_underline

GTK2.Button set_use_underline(int use_underline)

Description

If true, an underline in the text of the button label indicates the next character should be used for the mnemonic accelerator key.