Shape.ID Property (Visio)
Gets the ID of an object. Read-only.
The ID of a shape is unique only within the scope of the page or master.
If a shape, page, master, or style is deleted, future objects in the same scope may be assigned the same ID. Therefore, persisting shape or style IDs in separate data stores is generally not as sound as persisting unique IDs using the UniqueID property.
For Shape objects, you can use the ID property with methods such as GetResults and SetResults to get or set many cell values at once, possibly cells in many different shapes. To do this, you must pass shape IDs to the methods. If you create shapes by using the DropMany method, the method returns the IDs of the shapes it creates to your program.
If your Visual Studio solution includes the Microsoft.Office.Interop.Visio reference, this property maps to the following types: