_di_IXMLDocument and stylesheet adding

[bakus]

Hello,
I'm creating a XML document using _di_IXMLDocument type (with BCB6.0).
Additional there is a xslt file.
I want to add xml-stylesheet attributes in main document at runtime.
Which (_di_IXMLDocument)method /(_di_IXMLDocument)propertie is used to
add <?xml-stylesheet type=\"text/xsl\" href=\"sample.xslt\"?>

Thanks for help