I made this transparent buffer template from UEZ rotating letters example.
#include
#include
#include
#include
Global Const $width = 640
Global Const $height = 480
Global $graphics, $backbuffer, $bitmap
Global $ScreenDc, $dc, $tSize, $pSize, $tSource, $pSource, $tBlend, $pBlend, $tPoint, $pPoint, $gdibitmap
Global $dot_k = $Width
Global $Trans, $Size, $i
Opt("GUIOnEventMode", 1)
Opt("MouseCoordMode" ,0)
$GUI= GUICreate("", $width, $height, -1, -1, 0, $WS_EX_LAYERED + $WS_EX_TOPMOST) ;Window