I'm still confused with managed and unmanaged

In VS2005, in the same project with /CLR switch on.

in managed.h
ref class ManagedClass
{
}

in unmanaged.h
class UnmanagedClass
{
}

in Main.cpp
{
   ManagedClass^ mc = gcnew ManagedClass; // So this is managed
   UnmanagedClass umc;
}

My question is with UnmanagedClass umc; // So this creates a unmanaged
object, on the unmanaged heep? Does that mean all unmanged objects
won't be moved around by GC? (I assume yes since they are on unmanaged
heap).

Is there good reading describing this?