4 functions implement hook_custom_theme()

Note: the procedural functions in this list are found by pattern matching, so the list may include some functions that are not actually implementations of this hook.

menu_get_custom_theme in includes/menu.inc

Gets the custom theme for the current page, if there is one.

menu_set_custom_theme in includes/menu.inc

Sets a custom theme for the current page, if there is one.

menu_test_custom_theme in modules/simpletest/tests/menu_test.module

Implement hook_custom_theme().

system_custom_theme in modules/system/system.module

Implements hook_custom_theme().