diff --git a/src/widgets/network_content_widget.h b/src/widgets/network_content_widget.h
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--- /dev/null
+++ b/src/widgets/network_content_widget.h
@@ -0,0 +1,47 @@
+/* $Id$ */
+
+/*
+ * 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 network_content_widget.h Types related to the network content widgets. */
+
+#ifndef WIDGETS_NETWORK_CONTENT_WIDGET_H
+#define WIDGETS_NETWORK_CONTENT_WIDGET_H
+
+/** Widgets of the WC_NETWORK_STATUS_WINDOW (WC_NETWORK_STATUS_WINDOW is also used in NetworkJoinStatusWidgets). */
+enum NetworkContentDownloadStatusWindowWidgets {
+	NCDSWW_BACKGROUND, ///< Background
+	NCDSWW_CANCELOK,   ///< (Optional) Cancel/OK button
+};
+
+/** Widgets of the WC_NETWORK_WINDOW (WC_NETWORK_WINDOW is also used in NetworkGameWindowWidgets, NetworkStartServerWidgets, and NetworkLobbyWindowWidgets). */
+enum NetworkContentListWindowWidgets {
+	NCLWW_BACKGROUND,    ///< Resize button
+
+	NCLWW_FILTER_CAPT,   ///< Caption for the filter editbox
+	NCLWW_FILTER,        ///< Filter editbox
+
+	NCLWW_CHECKBOX,      ///< Button above checkboxes
+	NCLWW_TYPE,          ///< 'Type' button
+	NCLWW_NAME,          ///< 'Name' button
+
+	NCLWW_MATRIX,        ///< Panel with list of content
+	NCLWW_SCROLLBAR,     ///< Scrollbar of matrix
+
+	NCLWW_DETAILS,       ///< Panel with content details
+
+	NCLWW_SELECT_ALL,    ///< 'Select all' button
+	NCLWW_SELECT_UPDATE, ///< 'Select updates' button
+	NCLWW_UNSELECT,      ///< 'Unselect all' button
+	NCLWW_OPEN_URL,      ///< 'Open url' button
+	NCLWW_CANCEL,        ///< 'Cancel' button
+	NCLWW_DOWNLOAD,      ///< 'Download' button
+
+	NCLWW_SEL_ALL_UPDATE, ///< #NWID_SELECTION widget for select all/update buttons.
+};
+
+#endif /* WIDGETS_NETWORK_CONTENT_WIDGET_H */