WP Default actions

I use WPTools5 and delphi 7. I created rtf editor(or rather i am busy creating) using wprichtext and wp default actions. If i use wpaopen1 to open rtf docs, i need that name i selected in the open dialog to use for other feaetures i am adding manualy. I just cannot find where that filename is stored after opening the file. Can anyone help me here. Is there a property that stores that file name?

Thanks
Johann

thanks, works 100%