Function call on a pushbutton click

Hi,
Can anybody guide me to find a solution of the following problem
I have a push button and i want to call a function to transfer a file from one folder to another .
The problem is how to call that function on the click of the button.
Thanks in advance.

Hi,
Check the below code.
type-pools icon.
data: v_flag type c.
tables: sscrfields.
selection-screen begin of block file with frame.
selection-screen skip.
selection-screen pushbutton 1(30) xdatatxt user-command selx.
selection-screen skip.
selection-screen end of block file .
initialization.
xdatatxt+5 = 'Physical file'.
xdatatxt+0(5) = icon_address.
at selection-screen.
if sscrfields-ucomm = 'SELX'.
v_flag = 'X'.
endif.
start-of-selection.
if v_flag = 'X'.
write:/ 'selected'.
do what ever you want here
else.
write:/ 'No'.
endif.

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