Silent[=Param]
Start extraction without displaying the start dialog.
Param can be either 1 or 2.
If Param is 1, the start dialog is completely hidden, including the progress bar and file names. Also in this mode SFX does not display the license dialog.
If Param is omitted or equal to 2, the confirmation to start extracting is skipped, but users still see the archive extraction progress.
Silent=2