I want to create an autoit script which use WinAPI to setText and click button on dialog

Hello,

I have a following autoit script which works fine for me.

$title = "Open"
$file = "C:\temp\mylogfile.txt"
If WinExists($title) Then
ControlSetText($title,"","[CLASS:Edit;]",$file)
ControlClick($title, "", "[CLASS:Button; TEXT:&Open;]")
Else
MsgBox(0,"Upload Error", "Window not found", 2)
EndIf

Here I have used autoit functions. Instead of using autoit functions like WinExists, ControlSetText, ControlClick and MsgBox
I want to use only functions from the _WinAPI_ UDFs

Can anybody help me?

regards,
rahoolm