How can i switch two difference tab by clicking the child windows when i'm using the win32 API SetParent?

Question

i'm using win32 API SetParent to run an external app in a winform, and i need switch 2 deferent tabs by clicking on the child window. Can i do that?

i have a video to decribe this: https://youtu.be/bS5hNfQO92M

public Form1()
{
            InitializeComponent();
            ProcessStartInfo p2 = new ProcessStartInfo("flash.exe");
            p2.WindowStyle = ProcessWindowStyle.Minimized;
            Process p = Process.Start(p2);
            p.WaitForInputIdle();
            SetParent(p.MainWindowHandle, panel1.Handle);
            p2.WindowStyle = ProcessWindowStyle.Normal;
            MoveWindow(p.MainWindowHandle, 0, 0, 350, 350, true);
}

[DllImport("user32.dll")]
static extern IntPtr SetParent(IntPtr hwc, IntPtr hwp);

[DllImport("user32.dll", SetLastError = true)]
internal static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);