Code:
Public Class Form1
    Public Declare Function FindWindow Lib "user32.dll" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Int32
    Public Declare Function FindWindowEx Lib "user32.dll" Alias "FindWindowExA" (ByVal hWnd1 As Int32, ByVal hWnd2 As Int32, ByVal lpsz1 As String, ByVal lpsz2 As String) As Int32
    Public Declare Function SendMessage Lib "user32.dll" Alias "SendMessageA" (ByVal hwnd As Int32, ByVal wMsg As Int32, ByVal wParam As Int32, ByVal lParam As String) As Int32
    Public Const WM_SETTEXT As Int32 = &HC

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSEND.Click

        Dim hWnd As Int32 = FindWindow("#32770", vbNullString)
        If hWnd > 0 Then

            Dim hWndChild As Int32 = FindWindowEx(hWnd, 0, "ATL:00B4C870", vbNullString)

            If hWndChild > 0 Then
                MsgBox("Found!") ' Check to see if it is working
                Dim strText As String = textbox1.Text
                SendMessage(hWndChild, WM_SETTEXT, 0, strText)
            End If
        End If
    End Sub

End Class
This is working fine for, however my question is now... how do I make it press a button.

http://img399.imageshack.us/my.php?image=btnqa6.jpg

Above is the properties of the button.

Thanks guys!!