I forgot to set the handle to HDC.  Once resolved the code works fine.  Thanks for the help and the input.

JoeJ said:
The only way around that is 'foveated rendering', which is extremely promising, but requires an eye tracker on every display. : (

Yeah, I've been thinking about that also. Didn't know the name for it. It's a very situation-specific thing, I think, unless you're simply reducing the resoluti…