powerpoint textrange multiple styles : runs collection ?

[karim]

Hi,
I would like to know how
I can retrieve the styles applied to a text in a TextRange.
It works great if i have only one style applied to the whole text
but if in some parts of the text other styles (font,color...) are
applied I don't know how to do it !!! perhaps thru the Runs collection ???
I you can help me , it would be great !
Thanks
karim