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DX11 updating array variable in constant buffer

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Hi guys. I have a quick HLSL question. I have the following code:

cbuffer cbLights

And I want to be able to update gLight[1] individually from my c++ d3d11 application . How can I do that? I know how to do it if gLight was a single variable and not an array but this is new to me.

BTW: I'm using the effects framework provided by Microsoft in D3dx11effect.h

Regards! Edited by joystick-hero

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