Erweiterung III » How can use 'IDXGISwapChain1::Present1' function?

Hi,
I Want to use 'IDXGISwapChain1::Present1' funtion to use DXGI_PRESENT_DO_NOT_WAIT option.
I read the article that must use DXGI_PRESENT_DO_NOT_WAIT option to solve present blocking problem.
Visual Studio2015 V++.
Platform version Windows8.1.

So I made test sample source.
But the application screen does not drawn.

I can't not konw the reason.
Please let me know.

There is any sample code that use DXGI_PRESENT_DO_NOT_WAIT option?

Please help.
Thanks!
I didn't find the right solution from the Internet.
References:https://social.msdn.microsoft.com/Forums...tion?forum=vsga

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