Is it possible to read whole PDF file with OCR?

I have seen that when using OCR, we can only provide captured area from PDF file, to extract text from it.
So, How about reading whole PDF ?
is there any other way to achieve this ?
Can we do some sort of programming with OCR to achieve this ?

Thank you !

@sdhumal - with RPA Recorder you can only recognize the content of your current screen at a time. Using bot tasks you can do OCR for a whole document, but the RPA Express OCR does not support PDF files.

To recognize PDF files, you can use our WorkFusion SPA product -