Possible CLS improvement

[TerryRitchie]

don't forget the cursor position isn't going to be reset (which is good or bad depending on what you are doing).   In a really crude test CLS was still about twice as fast but the _putimage method is certainly a great idea for clearing the image at a handle.

That's a good point about the cursor position. Like Steve, I thought _PUTIMAGE would be faster too. Thanks for testing.