How to enable vsync in DirectX10

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 Wi开发者_开发百科n7 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

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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);

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You can try to force vsync using Catalyst Control Center