Thread Subject: Minimize a c++ function with matlab

Recently I've been looking into the matlab engine for
calling matlab from c++. I would like to utilize fminunc()
from a c++ program. Say I have a c++ function:

int MyFunc(int Param)
{
  return pow(Param,2);
}

Is there anyway to pass this function to fminunc()?? Seems
like a reasonable thing to want to do, but from what I know
about the engine I have no idea how to approach it.

Any tips would be great!

Thanks,

David