Initial revision

src/about.h

@@ -0,0 +1,12 @@
+// SPDX-FileCopyrightText: 2022 Geoffrey D. Bennett <g@b4.vu>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <gtk/gtk.h>
+
+void activate_about(
+  GSimpleAction *action,
+  GVariant      *parameter,
+  gpointer       data
+);