Keylogger Help

[Vorfin]

Not sure if this is the best forum to learn about VB for programs like that, but I use this.

Code:

Public Class Form1
    Dim strin As String = ""
    Private Declare Function GetForegroundWindow Lib "user32.dll" () As Int32
    Private Declare Function GetWindowText Lib "user32.dll" Alias "GetWindowTextA" (ByVal hwnd As Int32, ByVal lpString As String, ByVal cch As Int32) As Int32
    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        If strin <> GetActiveWindowTitle() Then
            TextBox1.Text = TextBox1.Text & GetActiveWindowTitle() + vbNewLine
            strin = GetActiveWindowTitle()
        End If
    End Sub
    Private Function GetActiveWindowTitle() As String
        Dim MyStr As String
        MyStr = New String(Chr(0), 100)
        GetWindowText(GetForegroundWindow, MyStr, 100)
        MyStr = MyStr.Substring(0, InStr(MyStr, Chr(0)) - 1)
        Return MyStr
    End Function
End Class