How can I export PDF from Aras? And add a function when I click relation line

Hi everyone

I am new here ,  I write a client method to sent value to server method to create a excel for user to download,

and now my boss says the file need to be PDF 

the only way I can find is using "Microsoft.Office.Interop.Excel.dll" ,

but it fail on aras , I had try many times

how can I do? Is there any other way to export PDF ?

And  When I right-click on relation's line it shows  view / copy / lock , how can I add a new function at here?

thanks !!!! 

BTW my version is 11SP9