Hmm...
F1 + GUIRegisterMsg + Windows Message Codes + WM_PAINT (0x000F)
#include <GDIPlus.au3>
_GDIPlus_Startup()
Global $image = _GDIPlus_ImageLoadFromFile("obrazek.bmp")
$hGUI = GUICreate("", 150, 150)
$hGraphics = _GDIPlus_GraphicsCreateFromHWND($hGUI)
GUIRegisterMsg(0x000F, 'WM_PAINT')
GUISetState()
Do
Until GUIGetMsg() = -3
Func WM_PAINT()
odswiez()
EndFunc
Func odswiez()
_GDIPlus_GraphicsClear($hGraphics)
$obrazek = _GDIPlus_GraphicsDrawImageRect($hGraphics, $image, 0, 0, 150, 150)
EndFunc