Try File #9493 here, Rick Strahl's West Wind Type Library Parser. This will make a header out of the constants in the type library for an object. Also, there are 4 files with header information here but I'm not sure what format they are in.

>I need some ".H" includables files for Microsoft Office applications... I know there is some files with all the constants in an excel document but I would like to have a file I can include in my project.
>
>Is someone here knows where I could find one ?