Public Class Form1
    Dim p() As Process
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles MyBase.Load
        Process.Start("Notepad.exe")
        Threading.Thread.Sleep(1000)
        p = Process.GetProcessesByName("notepad")
    End Sub
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles Button1.Click
        p(0).CloseMainWindow()
 
    End Sub
End Class