diff --git a/src/widgets/dropdown_func.h b/src/widgets/dropdown_func.h
new file mode 100644
--- /dev/null
+++ b/src/widgets/dropdown_func.h
@@ -0,0 +1,12 @@
+/* $Id$ */
+
+#ifndef WIDGETS_DROPDOWN_FUNC_H
+#define WIDGETS_DROPDOWN_FUNC_H
+
+/* Show drop down menu containing a fixed list of strings */
+void ShowDropDownMenu(Window *w, const StringID *strings, int selected, int button, uint32 disabled_mask, uint32 hidden_mask);
+
+/* Hide drop down menu of a parent window */
+void HideDropDownMenu(Window *pw);
+
+#endif /* WIDGETS_DROPDOWN_FUNC_H */