An unexpected CMD opens and stops working

[DomingoMG]

I have a note document open on my computer. ( NOTEPAD.EXE ).

I turn the application into launch mode.

flutter build windows

When I run the .exe and press the button it does it perfectly, but a cmd appears on the screen that disappears instantly.

But once the button is pressed it no longer works, hope someone can help me, thank you very much.

void killNotepad() async {
    String killNotepad = 'taskkill /im "notepad.exe" /F';    
    try {
      await run(killNotepad, throwOnError: false, runInShell: false);
    }catch(e){
      print('error');
    }
  }