_expression_ A variable that represents a **[ToolbarItem](Visio.ToolbarItem.md)** object. > Starting with Visio 2010, the Microsoft Office Fluent user interface (UI) replaced the previous system of ...
Using this control, you can embed the full functionality of the Visio drawing surface into your applications. You can take advantage of the full Visio object model (API) and you can pick the aspects ...