Using I_OI_DOCUMENT_PROXY I can display on GUI screen different pictures and objects.
However I can't figure out how to display PDF document!!!!!!
Interface I_OI_DOCUMENT_PROXY provides method OPEN_ACTIVEX_DOCUMENT.
But there is no documentation (few lines in BCCIOFFI.PDF are not sufficient, if you need to create working application).
And there are no functioning samples (SAPRDEMO_ACTIVEX_INTEGRATION generates only error messages)