Read the Commands field to obtain a direct pointer to the PathCommand array. This will allow the control points of the path to be modified directly, but it is not possible to resize the path. After making changes to the path, call Flush() to register the changes for the next redraw.

This field can also be written at any time with a new array of PathCommand structures. Doing so will clear the existing path, if any.

The author's computation of the total length of the path, in user units. This value is used to calibrate the user agent's own distance-along-a-path calculations with that of the author. The user agent will scale all distance-along-a-path computations by the ratio of PathLength to the user agent's own computed value for total path length. This feature potentially affects calculations for text on a path, motion animation and various stroke operations.

The Sequence is a string of points and instructions that define the path. It is based on the SVG standard for the path element d attribute, but also provides some additional features that are present in the vector engine. Commands are case insensitive.

The following commands are supported:

M: Move To
L: Line To
V: Vertical Line To
H: Horizontal Line To
Q: Quadratic Curve To
T: Quadratic Smooth Curve To
C: Curve To
S: Smooth Curve To
A: Arc
Z: Close Path

The use of lower case characters will indicate that the provided coordinates are relative (based on the coordinate of the previous command).

To terminate a path without joining it to the first coordinate, omit the Z from the end of the sequence.

The total number of points defined in the path Sequence is reflected in this field. Modifying the total directly is permitted, although this should be used for shrinking the list because expansion will create uninitialised command entries.