ART Line mark object.

Members:

IG_ARTX_line_bounds_get	Queries the bounding rectangle.
IG_ARTX_line_create	Creates line mark.
IG_ARTX_line_endhead_get	Queries the end head of the annotation.
IG_ARTX_line_endhead_set	Updates the end head of the annotation.
IG_ARTX_line_endpoint_get	Gets the line end point.
IG_ARTX_line_endpoint_set	Sets the line end point.
IG_ARTX_line_headfillcolor_get	Queries head fill color of the annotation.
IG_ARTX_line_headfillcolor_set	Updates the annotation head fill color.
IG_ARTX_line_line_get	Queries the annotation line attributes.
IG_ARTX_line_line_set	Updates the annotation line attributes.
IG_ARTX_line_opacity_get	Queries the value of annotation opacity.
IG_ARTX_line_opacity_set	Updates the value of annotation opacity.
IG_ARTX_line_starthead_get	Queries the start head of the annotation.
IG_ARTX_line_starthead_set	Updates the start head of the annotation.
IG_ARTX_line_startpoint_get	Gets the line start point.
IG_ARTX_line_startpoint_set	Sets the line start point.