When a shape is created, Microsoft PowerPoint automatically assigns it a name in the form ShapeType Number, where ShapeType identifies the type of shape or AutoShape, and Number is an integer that is unique within the collection of shapes on the slide. For example, the automatically generated names of the shapes on a slide could be Placeholder 1, Oval 2, and Rectangle 3. To avoid conflict with automatically assigned names, do not use the form ShapeType Number for user-defined names, where ShapeType is a value that is used for automatically generated names, and Number is any positive integer. A shape range must contain exactly one shape. Read/write.
Assembly: Microsoft.Office.Interop.PowerPoint (in Microsoft.Office.Interop.PowerPoint.dll)
You can use the object's name in conjunction with the Item method to return a reference to the object if the Item method for the collection that contains the object accepts it as an argument. For example, if the value of the Name property for a shape is Rectangle 2, then .Shapes("Rectangle 2") will return a reference to that shape.