diff --git a/dbus-top/main.hpp b/dbus-top/main.hpp
new file mode 100644
index 0000000..91c07da
--- /dev/null
+++ b/dbus-top/main.hpp
@@ -0,0 +1,37 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include "bargraph.hpp"
+
+#include <ncurses.h>
+
+#include <string>
+
+const int INVALID = -999; // Constant indicating invalid indices
+struct Rect
+{
+    int x, y, w, h; // X, Y, Width, Height
+    Rect(int _x, int _y, int _w, int _h) : x(_x), y(_y), w(_w), h(_h)
+    {}
+    Rect() : x(0), y(0), w(1), h(1)
+    {}
+};
+
+int DrawTextWithWidthLimit(WINDOW* win, std::string txt, int y, int x,
+                           int width, const std::string& delimiters);
+std::string FloatToString(float value);
+template <typename T>
+void HistoryBarGraph(WINDOW* win, const Rect& rect, BarGraph<T>* bargraph);