Find Textbox in Browser

Question

I've got an external running web application, in which I need to fill many textboxes with different values.

The textboxes seem to be in a Flash application.

But I cannot find the textboxes. So far I could get the browser and the document in it, with this, but I have no idea about the elements' names or ids. I need to search them in order to identify them.

using SHDocVw;
using mshtml;

---

    private const string AppURL = @"https://Application.html";

    static void Main(string[] args)
    {
        InternetExplorer IE;
        if (GetApp(out IE))
        {

            HTMLDocumentClass Doc = (HTMLDocumentClass)IE.Document;

        }

        Console.WriteLine("Programa encerrado, aperte qualquer tecla para sair");
        Console.ReadKey();

    }



    private static bool GetApp(out InternetExplorer Result)
    {
        Result = null;
        int AppCount = 0;
        ShellWindows Wins = new ShellWindows();
        foreach (InternetExplorer IE in Wins)
        {
            if (IE.LocationURL == AppURL)
            {
                AppCount++;
                Result = IE;
            }
        }

        if (AppCount == 0)
            Console.WriteLine("Running App wasn't found");
        else if (AppCount > 1)
            Console.WriteLine("There is more than one App running");
        else
            return true;

        return false;
    }

}