Possible to detect prohibited graphics hardware acceleration



I read in a lot of places that disabling the graphics hardware acceleration
might be forbidden with Windows Vista.
I also have a computer/graphics card like this: the slider/option in
"Troubleshooting" is missing and it says changing this setting is forbidden
by the driver.

My question: How can I detect programmatically that disabling the hardware
acceleration is prohibited?

This is useful for hiding the respective option in our software in this case.

Thank you in advance
Ulrich
.