Vector Length and Direction Code
Create Shape Definition Files
Codes 0, 1, and 2: End of Shape and Draw Mode Control
In addition to defining vectors, a specification byte can use special codes to create additional forms and specify certain actions.
To use a special code, the second character of the three-character string (the vector length specification) must be 0, or you can specify only the code number. For example, 008 and 8 are both valid specifications.