ThemeIndex Cell (Theme Properties Section)
Stores the enumeration of the built-in Microsoft Visio theme applied to the document, as an integer. When a new theme is chosen for the document, the ThemeIndex cell for the document and all pages and shapes it contains is updated with the index of the built-in theme.
To get a reference to the ThemeIndex cell by name from another formula, by value of the N attribute of a Cell element, or from a program using the CellsU property, use:
To get a reference to the ThemeIndex cell by index from a program, use the CellsSRC property with the following arguments: