How to enable vsync in DirectX10

Question

I'm working on a apps that's based on DirectX10 by using SlimDX. I would like to enable vsync similar to DirectX9, but the fps doesn't seems to lock to 60Hz(which happens if I'm using Direct9). I'm setting vsync by using this

SwapChain.Present(1, PresentFlags.None);

Did I do something wrong?

Btw, I'm running Win7 with ATI HD5570 video card. After some googling, I gather that ATI can force vsync on certain games. So I wonder if that's related.

Reference for code to C++ will do as well. I'll translate it myself.

Thanks

Answer 1

First argument of SwapChain.Present is syncInterval. 0 indicates that presentation should occur immediately, without synchronization. Any other value indicates that presentation should be synchonized with the specified next vertical blank. So use it like this:

SwapChain.Present(0, PresentFlags.None);

Answer 2

You can try to force vsync using catalyst control center

http://img51.imageshack.us/img51/4636/vsync.png

can't insert images directly (low rep)