Called by the base class to enable the derived transform to fully implement surface picking.
Syntax
HRESULT retVal = object.OnSurfacePick(OutPoint, ulInputIndex, InVec);
Parameters
- OutPoint [in, ref] 
 Type: const CDXDBnds- Coordinates of the point in the transform output space to use for surface picking. 
- ulInputIndex [out, ref] 
 Type: unsigned long- Index of the input that was hit. 
- InVec [out, ref] 
 Type: CDXDVec- Point on the input that was hit, in terms of the input coordinate space. 
See also
Reference