struct VS_OUTPUT
{
    float4 Position   : SV_POSITION;
    float4 Diffuse    : COLOR0;
    float2 TextureUV  : TEXCOORD0;
};

VS_OUTPUT RenderSceneVS( float4 vPos : POSITION,
                         float3 vNormal : NORMAL,
                         float2 vTexCoord0 : TEXCOORD,
                         uniform int nNumLights,
                         uniform bool bTexture,
                         uniform bool bAnimate )
{
    VS_OUTPUT Output;
    ...
    return Output;
}

// From https://learn.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-function-syntax