I am trying to hook all draw text APIs in Windows by hooking TextOut,DrawText,ExtTextOut, BitBlt. However, I see that there is strange thing that it is not consistent between machines. I see the the draw text APIs in some machines by my tool as well as using the API Monitor tool, but in some other machines, I could not see any draw text API called. This is really strange to me since it must call API to draw text except it uses other APIs that I did not hook. Does any one know which APIs that I can try to hook? Or why those machines have difference in draw text?
Thanks.