C# - How to PostMessage to a flash window embedded in a WebBrowser?

Question

I would like to know if there was any way to lock onto a Flash window and post a message to it? Another person here had the answer to it, his name is Spencer K. His question

Answer 1

Actually flash window has its own handle too. To get it you have to get the class names of the controls it is embedded in from Spy++, then you can reach it like this:

    [DllImport("user32.dll", SetLastError = true)]
    public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className, IntPtr windowTitle);
    public IntPtr Flash()
    {
        IntPtr pControl;
        pControl = FindWindowEx(webBrowser1.Handle, IntPtr.Zero, "Shell Embedding", IntPtr.Zero);
        pControl = FindWindowEx(pControl, IntPtr.Zero, "Shell DocObject View", IntPtr.Zero);
        pControl = FindWindowEx(pControl, IntPtr.Zero, "Internet Explorer_Server", IntPtr.Zero);
        pControl = FindWindowEx(pControl, IntPtr.Zero, "MacromediaFlashPlayerActiveX", IntPtr.Zero);
        return pControl;
    }

When you get the handle, you can post the clicks:

    [DllImport("user32.dll", SetLastError = true)]
    static extern bool PostMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);
    public enum WMessages : int
    {
        WM_LBUTTONDOWN = 0x201,
        WM_LBUTTONUP = 0x202
    }
    private int MAKELPARAM(int p, int p_2)
    {
        return ((p_2 << 16) | (p & 0xFFFF));
    }
    public void DoMouseLeftClick(IntPtr handle, Point x)
    {
        PostMessage(handle, (uint)WMessages.WM_LBUTTONDOWN, 0, MAKELPARAM(x.X, x.Y));
        PostMessage(handle, (uint)WMessages.WM_LBUTTONUP, 0, MAKELPARAM(x.X, x.Y));            
    }

The points will be relative to the client, so when you save them, you should save it like this:

    List plist = new List();
    private void webBrowser1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
    {
        switch (e.KeyCode)
        {
            case Keys.C:                   
                plist.Add(webBrowser1.PointToClient(Cursor.Position));                    
                break;
            default:
                break;
        }
    }

Hope this was helpful