inno setupで excelが起動してたら止める

tool

issに以下記述

;excel起動してたら終了
[Code]
function IsAppRunning(const FileName: string): Boolean;
var
  FWMIService: Variant;
  FSWbemLocator: Variant;
  FWbemObjectSet: Variant;
begin
  Result := false;
  FSWbemLocator := CreateOleObject('WBEMScripting.SWBEMLocator');
  FWMIService := FSWbemLocator.ConnectServer('', 'root\CIMV2', '', '');
  FWbemObjectSet := FWMIService.ExecQuery(Format('SELECT Name FROM Win32_Process Where Name="%s"',[FileName]));
  Result := (FWbemObjectSet.Count > 0);
  FWbemObjectSet := Unassigned;
  FWMIService := Unassigned;
  FSWbemLocator := Unassigned;
end;

function InitializeSetup: boolean;
begin
  Result := not IsAppRunning('excel.exe');
  if not Result then
  MsgBox('excel.exe が起動しています。 Excelを終了させてから再度お試し下さい。', mbError, MB_OK);
end;

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