Using(SE41) GUI Download Button, Download the Purchased Documents into presentation Server, ABAP Obj

First we create the abap program and then we add the download button using se41 t-code.Based on the given purchasing document numbers display the purchasing document numbers,document dates, & vendor numbers, And also design one download button in the application tool bar. If the user clicks on download button then we download the display records into presentation server.
Steps to create the GUI to the program:
Syntax of attaching our own GUI to the program