how to load dinamically image in a pdf report

Hi i have this problem i have to load a no_db file and I have to print it on a pdf file…

I see in report builder the possibility to load image using object "file link" but i don't uderstand how to setting dinamically the property source Filename…

ie

srw.set_file_link_property(source_filename,my_image_path);

if it's not possible please give me some help to bypass this problem..

the problem is: the user choose an argument (master) that has a detail foto that i have to print in a pdf file.

tkx for your support