diff --git a/src/widgets/settings_widget.h b/src/widgets/settings_widget.h
new file mode 100644
--- /dev/null
+++ b/src/widgets/settings_widget.h
@@ -0,0 +1,73 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file settings_widget.h Types related to the settings widgets. */
+
+#ifndef WIDGETS_SETTINGS_WIDGET_H
+#define WIDGETS_SETTINGS_WIDGET_H
+
+/** Widgets of the WC_GAME_OPTIONS (WC_GAME_OPTIONS is also used in others). */
+enum GameOptionsWidgets {
+	GOW_BACKGROUND,             ///< Background of the window
+	GOW_CURRENCY_DROPDOWN,      ///< Currency dropdown
+	GOW_DISTANCE_DROPDOWN,      ///< Measuring unit dropdown
+	GOW_ROADSIDE_DROPDOWN,      ///< Dropdown to select the road side (to set the right side ;))
+	GOW_TOWNNAME_DROPDOWN,      ///< Town name dropdown
+	GOW_AUTOSAVE_DROPDOWN,      ///< Dropdown to say how often to autosave
+	GOW_LANG_DROPDOWN,          ///< Language dropdown
+	GOW_RESOLUTION_DROPDOWN,    ///< Dropdown for the resolution
+	GOW_FULLSCREEN_BUTTON,      ///< Toggle fullscreen
+	GOW_SCREENSHOT_DROPDOWN,    ///< Select the screenshot type... please use PNG!
+	GOW_BASE_GRF_DROPDOWN,      ///< Use to select a base GRF
+	GOW_BASE_GRF_STATUS,        ///< Info about missing files etc.
+	GOW_BASE_GRF_DESCRIPTION,   ///< Description of selected base GRF
+	GOW_BASE_SFX_DROPDOWN,      ///< Use to select a base SFX
+	GOW_BASE_SFX_DESCRIPTION,   ///< Description of selected base SFX
+	GOW_BASE_MUSIC_DROPDOWN,    ///< Use to select a base music set
+	GOW_BASE_MUSIC_STATUS,      ///< Info about corrupted files etc.
+	GOW_BASE_MUSIC_DESCRIPTION, ///< Description of selected base music set
+};
+
+/** Widgets of the WC_GAME_OPTIONS (WC_GAME_OPTIONS is also used in others). */
+enum GameDifficultyWidgets {
+	GDW_LVL_EASY,
+	GDW_LVL_MEDIUM,
+	GDW_LVL_HARD,
+	GDW_LVL_CUSTOM,
+	GDW_HIGHSCORE,
+	GDW_ACCEPT,
+	GDW_CANCEL,
+
+	GDW_OPTIONS_START,
+};
+
+/** Widgets of the WC_GAME_OPTIONS (WC_GAME_OPTIONS is also used in others). */
+enum GameSettingsWidgets {
+	SETTINGSEL_OPTIONSPANEL, ///< Panel widget containing the option lists
+	SETTINGSEL_SCROLLBAR,    ///< Scrollbar
+};
+
+/** Widgets of the WC_CUSTOM_CURRENCY. */
+enum CustomCurrencyWidgets {
+	CUSTCURR_RATE_DOWN,
+	CUSTCURR_RATE_UP,
+	CUSTCURR_RATE,
+	CUSTCURR_SEPARATOR_EDIT,
+	CUSTCURR_SEPARATOR,
+	CUSTCURR_PREFIX_EDIT,
+	CUSTCURR_PREFIX,
+	CUSTCURR_SUFFIX_EDIT,
+	CUSTCURR_SUFFIX,
+	CUSTCURR_YEAR_DOWN,
+	CUSTCURR_YEAR_UP,
+	CUSTCURR_YEAR,
+	CUSTCURR_PREVIEW,
+};
+
+#endif /* WIDGETS_SETTINGS_WIDGET_H */