hi, I need to write a program that temporally disables directdraw hardware acceleration (I'm trying to capture video frames from video players). I'm disabling it writing a value in the directdraw registry key, but this approach doesn't work on limited user accounts, because directdraw registry key is located in HKEY_LOCAL_MACHINE, which isn't accessible for writing. Is there another way for my program to disable directdraw acceleration? Thanks, Juan