How to Read PDF Content

I am uploading a PDF file in EH_ON(Event handler)

Now i need to read the content of the PDF.

code for uploading which i used is

call function 'GUI_UPLOAD'

exporting

filename = 'C:\temp\45FAE652D0.pdf'

filetype = 'BIN'

importing

filelength = length

tables

data_tab = itab.

Now i need to read the content of PDF.

can anyone help me with the code or concept for it.