set-style in pen%

Sets the pen style. See pen% for information about the possible styles.

A pen cannot be modified if it was obtained from a pen-list% or while it is selected into a drawing context.

• (send a-pen set-style style) -> void
     style : symbol in '(transparent solid xor dot long-dash short-dash dot-dash xor-dot xor-long-dash xor-short-dash xor-dot-dash)