When you click the Start Notepad button, the program creates a ProcessStartInfo object, passing it the name of the program to start.

It then creates a Process object and sets its StartInfo property to the ProcessStartInfo object. The code calls the Process's Start method to start the Notepad process and then calls WaitForExit so it waits until Notepad exits.

Private Sub btnStartNotepad_Click(ByVal sender As _
    System.Object, ByVal e As System.EventArgs) Handles _
    btnStartNotepad.Click
    ' Set start information.
    Dim start_info As New _
        ProcessStartInfo("C:\WINDOWS\NOTEPAD.EXE")
    start_info.UseShellExecute = False
    start_info.CreateNoWindow = True

    ' Make the process and set its start information.
    Dim proc As New Process
    proc.StartInfo = start_info

    ' Start the process.
    proc.Start()

    ' Wait until Notepad exits.
    proc.WaitForExit()

    MessageBox.Show("Exit Code: " & proc.ExitCode, "Exit " & _
        "Code", _
        MessageBoxButtons.OK, MessageBoxIcon.Information)
End Sub