D3D12_STATIC_SAMPLER_DESC

typedef struct D3D12_STATIC_SAMPLER_DESC
{
    D3D12_FILTER Filter;
    D3D12_TEXTURE_ADDRESS_MODE AddressU;
    D3D12_TEXTURE_ADDRESS_MODE AddressV;
    D3D12_TEXTURE_ADDRESS_MODE AddressW;
    FLOAT MipLODBias;
    UINT MaxAnisotropy;
    D3D12_COMPARISON_FUNC ComparisonFunc;
    D3D12_STATIC_BORDER_COLOR BorderColor;
    FLOAT MinLOD;
    FLOAT MaxLOD;
    UINT ShaderRegister;
    UINT RegisterSpace;
    D3D12_SHADER_VISIBILITY ShaderVisibility;
} D3D12_STATIC_SAMPLER_DESC

Texture2D<float4> a : register(t2, space3);