Sub AlignActiveCustomCoordinateSystemXYPlane( _
   IMathPoint* Origin As MathPoint, _
   IMathPoint* XAxisThroughPoint As MathPoint, _
   IMathPoint* XYPlaneThroughPoint As MathPoint _
) 

void AlignActiveCustomCoordinateSystemXYPlane( 
   MathPoint Origin,
   MathPoint XAxisThroughPoint,
   MathPoint XYPlaneThroughPoint
)

AlignActiveCustomCoordinateSystemXYPlane( 
   Origin : MathPoint,
   XAxisThroughPoint : MathPoint,
   XYPlaneThroughPoint : MathPoint
)

HRESULT AlignActiveCustomCoordinateSystemXYPlane( 
   dsMathPoint* Origin,
   dsMathPoint* XAxisThroughPoint,
   dsMathPoint* XYPlaneThroughPoint
) 

DSRESULT AlignActiveCustomCoordinateSystemXYPlane( 
   IMathPoint* Origin,
   IMathPoint* XAxisThroughPoint,
   IMathPoint* XYPlaneThroughPoint
) 

Parameters

Origin

Custom coordinate system's origin

XAxisThroughPoint

Direction point for the x axis of the coordinate system (see Remarks)

XYPlaneThroughPoint

Point to describe the xy plane of the coordinate system (see Remarks)

The point specified for XYPlaneThroughPoint specifies which plane the y axis is in and the direction of the y axis orthogonal to XAxisThroughPoint, resulting in a vector that is orthogonal to the x and y axes.

There are two possible orthogonal vectors for the z axis, depending on the direction of the y axis. Both vectors have the same XAxisThroughPoint; however, both the y and z axis are in different directions, depending on XYPlaneThroughPoint.