Open dialog box at the press of push button in alv tool bar

Hi team,

I have created alv report displaying field contents.mean while i have created one pushbutton in toolbar at the alv report output for downloading the data into CSV Format.

The requirement is ,At the push of the button, a standard download dialog box should open for download to local computer. The path and file name from the initial screen should be defaulted, but possible to update on the dialog box.

please suggest me how to create download dialog box with field as file path where i can edit the defaulted file path.

please let me know,how can i go ahead and satisfy the reuirement or share me piece of code if you have.

Thanks And Regards,

Sakti.