/// <summary>
/// Given a <see cref="System.IntPtr"/> from a generated Vtable, convert to the target type.
/// </summary>
/// <typeparam name="T">Desired type.</typeparam>
/// <param name="dispatchPtr">Pointer supplied to Vtable function entry.</param>
/// <returns>Instance of type associated with dispatched function call.</returns>
public static unsafe T GetInstance <T>(ComInterfaceDispatch *dispatchPtr) where T : class
{
// See the dispatch section in the runtime for details on the masking below.
const long DispatchThisPtrMask = ~0xfL;
var comInstance = *(ComInterfaceInstance **)(((long)dispatchPtr) & DispatchThisPtrMask);
return(Unsafe.As <T>(GCHandle.InternalGet(comInstance->GcHandle)));
}
