Como formatar um disquete

{implementation section}
....
const
SHFMT_ID_DEFAULT = $FFFF;
// Formating options
SHFMT_OPT_QUICKFORMAT = $0000;
SHFMT_OPT_FULL = $0001;
SHFMT_OPT_SYSONLY = $0002;
// Error codes
SHFMT_ERROR = $FFFFFFFF;
SHFMT_CANCEL = $FFFFFFFE;
SHFMT_NOFORMAT = $FFFFFFFD;

function SHFormatDrive(Handle: HWND; Drive, ID, Options: Word): LongInt; stdcall; external 'shell32.dll' name 'SHFormatDrive'

procedure TForm1.btnFormatDiskClick(Sender: TObject);
var
retCode: LongInt;
begin
retCode:= SHFormatDrive(Handle, 0, SHFMT_ID_DEFAULT, SHFMT_OPT_QUICKFORMAT);
if retCode < 0 then ShowMessage('Could not format drive');
end;