Option Explicit On
 
Public Class Form1
 
    Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" ( _
      ByVal hwnd As Integer, ByVal wMsg As String, ByVal wParam As Integer, _
      ByVal _
      lParam As Integer) As Integer
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles Button1.Click
 
        SendMessage(2230562, "hallo", 86, 1)
 
    End Sub
 
End Class