D3D11_SO_DECLARATION_ENTRY pDecl[] =
{
    // semantic name, semantic index, start component, component count, output slot
    { 0, "SV_POSITION", 0, 0, 4, 0 },   // output all components of position
    { 0, "VELOCITY", 0, 0, 3, 0 },     // output the first 3 of the normal
    { 0, "AGE", 0, 0, 1, 0 },     // output the first 2 texture coordinates
    { 0, "TYPE", 0, 0, 1, 0 }
};

   hr=pD3dDevice->CreateGeometryShaderWithStreamOutput(bob->GetBufferPointer(), bob->GetBufferSize(),pDecl, sizeof(pDecl)/sizeof(D3D11_SO_DECLARATION_ENTRY),NULL,0,0,NULL,&GeometryShader);

technique DefaultTechnique
{
    pass pass1
    {
        SetVertexShader(CompileShader(vs_5_0, VSMain()));

        SetGeometryShader(GSMain1);

        SetPixelShader(NULL);

        SetDepthStencilState(DisableDepth,0);
    }
}