open 3rd party exe in my winform as tab?

[Crash893]

I wanted to open a exe as a tabs in program that im creating.

so far i haven't had much luck.

the code ive been trying to use is

public class Native
        {
            [DllImport("user32.dll", SetLastError = true)]
            private static extern uint SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
            public static void LoadProcessInControl(string _Process, Control _Control)
            {
                System.Diagnostics.Process p = System.Diagnostics.Process.Start(_Process);
                p.WaitForInputIdle();
                Native.SetParent(p.MainWindowHandle, _Control.Handle);
            }
        }

but even though it runs with out error i don't get anything when i run the method like so.

Native.LoadProcessInControl(@"D:\WINDOWS\notepad.exe", this.splitContainer1.Panel2);

any ideas if im barking up the right tree or why this code might not be working?