diff --git a/src/textfile_gui.h b/src/textfile_gui.h
new file mode 100644
--- /dev/null
+++ b/src/textfile_gui.h
@@ -0,0 +1,46 @@
+/* $Id$ */
+
+/*
+ * 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 textfile_gui.h GUI functions related to textfiles. */
+
+#ifndef TEXTFILE_GUI_H
+#define TEXTFILE_GUI_H
+
+#include "strings_func.h"
+#include "textfile_type.h"
+#include "window_gui.h"
+
+/** Window for displaying a textfile */
+struct TextfileWindow : public Window, MissingGlyphSearcher {
+	TextfileType file_type;              ///< Type of textfile to view.
+	int line_height;                     ///< Height of a line in the display widget.
+	Scrollbar *vscroll;                  ///< Vertical scrollbar.
+	Scrollbar *hscroll;                  ///< Horizontal scrollbar.
+	char *text;                          ///< Lines of text from the NewGRF's textfile.
+	SmallVector<const char *, 64> lines; ///< #text, split into lines in a table with lines.
+	uint max_length;                     ///< The longest line in the textfile (in pixels).
+	uint search_iterator;                ///< Iterator for the font check search.
+
+	static const int TOP_SPACING    = WD_FRAMETEXT_TOP;    ///< Additional spacing at the top of the #WID_TF_BACKGROUND widget.
+	static const int BOTTOM_SPACING = WD_FRAMETEXT_BOTTOM; ///< Additional spacing at the bottom of the #WID_TF_BACKGROUND widget.
+
+	TextfileWindow(TextfileType file_type);
+	virtual ~TextfileWindow();
+	virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize);
+	virtual void DrawWidget(const Rect &r, int widget) const;
+	virtual void OnResize();
+	virtual void Reset();
+	virtual FontSize DefaultSize();
+	virtual const char *NextString();
+	virtual bool Monospace();
+	virtual void SetFontNames(FreeTypeSettings *settings, const char *font_name);
+	virtual void LoadTextfile(const char *textfile, Subdirectory dir);
+};
+
+#endif /* TEXTFILE_GUI_H */