delphi 调用外部程序获取程序ID，并能关闭该程序

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hApp: Cardinal;

function StartApp(apchOperation, apchFileName, apchParameters, apchDirectory: PChar;
  awrdShowCmd: Word): Cardinal;
var
  lseiInfo: TShellExecuteInfo;
begin
  Result := 0;

  FillChar(lseiInfo, SizeOf(lseiInfo), Chr(0));
  lseiInfo.cbSize := SizeOf(lseiInfo);
  lseiInfo.fMask := SEE_MASK_NOCLOSEPROCESS;
  lseiInfo.lpVerb := apchOperation;
  lseiInfo.lpFile := apchFileName;
  lseiInfo.lpParameters := apchParameters;
  lseiInfo.lpDirectory := apchDirectory;
  lseiInfo.nShow := awrdShowCmd;

  if Boolean(ShellExecuteEx(@lseiInfo)) then
    Result := lseiInfo.hProcess;
end;

procedure DestroyProcess(hProcess: Cardinal);
Var
  ovExitCode: LongWord;
begin
  try
    if hProcess<>0 then
    begin
      GetExitCodeProcess(hProcess, ovExitCode);
      if (ovExitCode = STILL_ACTIVE) or (ovExitCode <> WAIT_OBJECT_0) then
        TerminateProcess(hProcess, ovExitCode);
      CloseHandle(hProcess);
    end;
  except
  end;
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  hApp := StartApp('open', 'd:\Workers.pdf', '', '', SW_SHOWNORMAL);
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
  if hApp > 0 then
    DestroyProcess(hApp);
end;
 

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