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function InstallInf(const PathName: string; hParent: HWND): Boolean;
var
  instance: HINST;
begin
  instance := ShellExecute(hParent,
      PChar('open'),
      PChar('rundll32.exe'),
      PChar('setupapi,InstallHinfSection DefaultInstall 132 ' + PathName),
      nil,
      SW_HIDE) ;
   Result := instance > 32;
end;
procedure TForm1.btn1Click(Sender: TObject);
begin
  if InstallInf('F:\abc\arusb_lh.inf', 0) then
    ShowMessage('OK');
end;


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var
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    p: ^Integer;
begin
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    begin
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