Populate pivot table with preselected items
 

I have populate a pivot table using C#.net. I have used analysis cube as
source of the pivot table. Now by pivottable.MDX property I got the mdx which
indicates what items I have selected from the pivot table page fields. I
saved the MDX and closed the excel. In my pivot table I have only page fields
and one data field. Now I want to repopulate the same pivot table where only
pre selected items are selected and others are unselected. I want to do this
programmatically. I am using VSTO 2005. How can I do this?