freebsd man page for d_slider_proc

d_slider_proc(3alleg4)						  Allegro manual					    d_slider_proc(3alleg4)

NAME

       d_slider_proc - Dialog procedure implementing a slider control object. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       int d_slider_proc(int msg, DIALOG *d, int c);

DESCRIPTION

       A  slider  control object. This object holds a value in d2, in the range from 0 to d1. It will display as a vertical slider if h is greater
       than or equal to w, otherwise it will display as a horizontal slider. The dp field can contain an optional bitmap to  use  for  the  slider
       handle, and dp2 can contain an optional callback function, which is called each time d2 changes. The callback function should have the fol-
       lowing prototype:

	  int function(void *dp3, int d2);

       The d_slider_proc object will return the value of the callback function.

SEE ALSO

       exgui(3alleg4), exrgbhsv(3alleg4)

Allegro 							   version 4.4.2					    d_slider_proc(3alleg4)