d_button_proc (3) - Linux Manuals
d_button_proc: Dialog procedure implementing a button object. Allegro game programming library.
Command to display d_button_proc manual in Linux: $ man 3 d_button_proc
NAME
d_button_proc - Dialog procedure implementing a button object. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
int d_button_proc(int msg, DIALOG *d, int c);
DESCRIPTION
A button object (the dp field points to the text string). This object can
be selected by clicking on it with the mouse or by pressing its keyboard
shortcut. If the D_EXIT flag is set, selecting it will close the dialog,
otherwise it will toggle on and off. Like d_text_proc(), ampersands can
be used to display the keyboard shortcut of the button.