ImageGear ArtX Component provides the following public structures:

AT_ARTX_ARROW_HEAD	Contains members that specify attributes of arrow drawn on end of line annotations.
AT_ARTX_ASPECTRATIO	Contains members that specify aspect ratio parameters used in some annotations.
AT_ARTX_BORDER	Contains members that specify line drawing attributes.
AT_ARTX_BURNIN_PARAMS	Contains members that specify burn in parameters.
AT_ARTX_CALLOUT	Contains members that specify attributes of callout drawn with text annotations.
AT_ARTX_DRAW_PARAMS	Contains members that specify drawing parameters.
AT_ARTX_EDIT_PARAMS	Contains members that specify action edit parameters.
AT_ARTX_FONT	Contains members that specify font in format close to MS GDI+ native font.
AT_ARTX_HITTEST_PARAMS	Contains members that specify hit test parameters.
AT_ARTX_PIN	Contains members that specify attributes of Pin drawn with text annotations.