Unload Form1 when embedded cmd process ends - vb.net

Question

I have found some code which runs a cmd.exe shell interactively in a TextBox; later on I will replace cmd.exe with a different character based application.
Here's the code:
Public Class Form1
Dim P As New Process
Dim SW As System.IO.StreamWriter
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.Text = "My title"
AddHandler P.OutputDataReceived, AddressOf DisplayOutput
P.StartInfo.CreateNoWindow() = True
P.StartInfo.UseShellExecute = False
P.StartInfo.RedirectStandardInput = True
P.StartInfo.RedirectStandardOutput = True
P.StartInfo.FileName = "cmd"
P.Start()
P.SynchronizingObject = TextBox1
P.BeginOutputReadLine()
SW = P.StandardInput
SW.WriteLine()
End Sub
Private Sub DisplayOutput(ByVal sendingProcess As Object, ByVal output As DataReceivedEventArgs)
TextBox1.AppendText(output.Data() & vbCrLf)
End Sub
Private Sub Textbox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
Static Line As String
If e.KeyChar = Chr(Keys.Return) Then
SW.WriteLine(Line & vbCrLf)
Line = ""
Else
Line = Line & e.KeyChar
End If
End Sub
End Class
When you enter the exit command, the cmd.exe process terminates.
I like my application to unload Form1 when this occurs, but I don't know how to implement this.

Answer 1

As suggested by Jimi, I added the following line to he Form1_Load sub:
P.EnableRaisingEvents = True
and added:
Private Sub myProcess_Exited(ByVal sender As Object, ByVal e As System.EventArgs) Handles P.Exited
Me.Close()
End Sub
This is working; thank you very much Jimi!

Answer 2

Add this above End Sub in your Form1_Load Sub:
p.WaitForExit()
Form1.Close()
Since it looks like you're calling it from Form1 itself, you could also use Me.Close.
If Form1 is the only form and you want the whole application to close, you can use Application.Exit() instead.
Some references:
http://www.vb-helper.com/howto_net_start_notepad_wait.html
https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.form.close?view=windowsdesktop-6.0