How would i kill an application, I'm creating my first project in VB and this is my code so far:

Code:
Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Shell("samp-server.exe")
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

    End Sub
End Class
How could i kill samp-server.exe in button2?, Also how could i echo a .txt file into a TextBox?

Thanks,

Chris