RelQuadBezTo Row (Geometry Section)
Published: July 16, 2012
Contains the x and ycoordinates of the endpoint of a quadratic Bézier curve relative to the shape’s width and height and the x and ycoordinates of the control point of the curve relative shape’s width and height.
Note 

A RelQuadBezTo row can only be persisted in the .vsdx, .vsdm, .vstx, .vstm, .vssx, and .vssm file formats. When a file is saved to the Visio 20032010 formats, the RelQuadBezTo row is converted to a NURBSTo row. 
A RelQuadBezTo row contains the following cells.
Cell 
Description 

The xcoordinate of the ending vertex of a quadratic Bézier curve relative to the width of the shape. 

The ycoordinate of the ending vertex of a quadratic Bézier curve relative to the height of the shape. 

The xcoordinate of the curve’s control point relative to the shape’s width; a point on the arc. The control point is best located about halfway between the beginning and ending vertices of the arc. 

The ycoordinate of a curve’s control point relative to the shape’s height. 