This topic documents a feature of Visual Filters and Transitions, which is deprecated as of Windows Internet Explorer 9 and obsolete as of Internet Explorer 10.
Called by the base class to determine the amount of data space currently occupied by the transform.
virtual ULONG OnGetObjectSize(VOID) = 0;
Returns the size of the object and its currently allocated resources, in bytes.
The transform user can use this information to optimize memory usage in the system.