You can't insert a menu item that is always visible by using Visual Studio Tools for Microsoft Dynamics GP
This article discusses that you can't insert a menu item that is always visible by using Visual Studio Tools for Microsoft Dynamics GP.
Applies to: Microsoft Dynamics GP
Original KB number: 922871
Introduction
You can use the AddMenuHandler method on a specific Microsoft Dynamics GP form to add to the menu structure in Microsoft Dynamics GP. This menu item is only visible when the selected Microsoft Dynamics GP form is open. However, you can't insert a menu item that is always visible in Microsoft Dynamics GP.
More information
For example, the following line of C# code adds a new item to the Extras menu that is visible when the Sales Transaction window is open.
Dynamics.Forms.SopEntry.AddMenuHandler(new EventHandler(SOPEntryFormHandler), "SOP Menu Item");
For version 10.00 of Microsoft Dynamics GP, there's a utility that can be used to add your own entries into the navigation menus of the application.
References
For more information, read the Visual Studio Tools for Microsoft Dynamics GP Programmer's Guide.