PD_PARAM_ADD command
-->(PD_PARAM_ADD)--+---(ANGLE_PAR)----+---|parameter name|--->
| |
+---(LENGTH_PAR)---+
| |
+---(POINT_PAR)----+
| |
+---(USER_PAR)-----+
PD_PARAM_ADD adds a new parameter to the current part. The parameter must be one of four types: angle, length, point or user.