HLSL StructuredBuffer usage

Hi,

I am a newbie for DirectX and HLSL shader.

In my HLSL shader,  I would like to use a StructuredBuffer to store a volume data:

On GPU:

uniform StructuredBuffer<float> _VolBuffer;

float SampleVol(int index1D ) {

return __VolBuffer[index1D];
}

However, I am not clear how to initialize this buffer from CPU side, i.e., how to create this buffer and fill with some initial data?

Thanks.

YL