---
name: "excustom"
section: "3alleg4"
platform: "linux"
package: "allegro4-doc"
version: "2:4.4.3.1-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/excustom/3alleg4"
---

# excustom(3alleg4)

Creating custom GUI objects. Allegro game programming library.

## NAME

excustom - Creating custom GUI objects. Allegro game programming library.

## SYNOPSIS

**#include \<allegro.h\>**

**Example excustom**

## DESCRIPTION

A follow up of the exgui.c example showing how to customise the default Allegro framework. In this case a dialog procedure animates a graphical clock without disrupting other GUI dialogs.  A more simple option shows how to dynamically change the font used by all GUI elements.

## SEE ALSO

**BITMAP**(3alleg4), **DATAFILE**(3alleg4), **DIALOG**(3alleg4), **END\_OF\_MAIN**(3alleg4), **FONT**(3alleg4), **allegro\_error**(3alleg4), **allegro\_init**(3alleg4), **allegro\_message**(3alleg4), **blit**(3alleg4), **circle**(3alleg4), **circlefill**(3alleg4), **clear\_to\_color**(3alleg4), **create\_bitmap**(3alleg4), **d\_button\_proc**(3alleg4), **d\_check\_proc**(3alleg4), **d\_clear\_proc**(3alleg4), **d\_edit\_proc**(3alleg4), **desktop\_palette**(3alleg4), **destroy\_bitmap**(3alleg4), **do\_dialog**(3alleg4), **fixcos**(3alleg4), **fixed**(3alleg4), **fixmul**(3alleg4), **fixsin**(3alleg4), **fixtoi**(3alleg4), **font**(3alleg4), **install\_keyboard**(3alleg4), **install\_mouse**(3alleg4), **install\_timer**(3alleg4), **itofix**(3alleg4), **key**(3alleg4), **line**(3alleg4), **load\_datafile**(3alleg4), **makecol**(3alleg4), **object\_message**(3alleg4), **replace\_filename**(3alleg4), **screen**(3alleg4), **set\_gfx\_mode**(3alleg4), **set\_palette**(3alleg4), **unload\_datafile**(3alleg4)