delphi - 如何使用Delphi检查进程是否正在运行？

与此问题类似，但在Delphi中：

How do I find out if a process is already running using c#?

我有一个更新程序，我希望它检查要更新的程序当前未运行，最好检查所有用户，而不仅仅是当前用户。

最佳答案

来自：http://www.delphitricks.com/source-code/windows/check_if_a_process_is_running.html

uses TlHelp32;

    function processExists(exeFileName: string): Boolean;
var
  ContinueLoop: BOOL;
  FSnapshotHandle: THandle;
  FProcessEntry32: TProcessEntry32;
begin
  FSnapshotHandle := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
  FProcessEntry32.dwSize := SizeOf(FProcessEntry32);
  ContinueLoop := Process32First(FSnapshotHandle, FProcessEntry32);
  Result := False;
  while Integer(ContinueLoop) <> 0 do
  begin
    if ((UpperCase(ExtractFileName(FProcessEntry32.szExeFile)) =
      UpperCase(ExeFileName)) or (UpperCase(FProcessEntry32.szExeFile) =
      UpperCase(ExeFileName))) then
    begin
      Result := True;
    end;
    ContinueLoop := Process32Next(FSnapshotHandle, FProcessEntry32);
  end;
  CloseHandle(FSnapshotHandle);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  if processExists('notepad.exe') then
    ShowMessage('process is running')
  else
    ShowMessage('process not running');
end;