How do I use _com_ptr_t?

Say I have a class that owns a D3DDevice:

class Thing{public:    Thing()    {        D3D11CreateDevice(..., &device, ...);    }    ~Thing()    {        device->Release();    }private:    ID3D11Device* device;};

From what I understand, I can use _com_ptr_t to ensure that the object gets deleted without my having to explicitly call Release() in the destructor. The problem though is that I can't figure out the correct syntax for the template.

I could find hardly any information on _com_ptr_t, and the closest thing I could find to an answer was this (Japanese) one. Following the syntax there, I get a bunch of compiler errors:

private:    //ID3D11Device* device;    _com_ptr_t <_com_IIID<ID3D11Device, &__uuidof(ID3D11Device)>> device;error C2143: syntax error : missing ';' before '<'error C4430: missing type specifier - int assumed. Note: C++ does not support default-interror C2238: unexpected token(s) preceding ';'error C2065: 'device' : undeclared identifier

By the way, I can use this to return COM pointers from functions and ensure that they get deleted when they leave the caller's scope, right?