DRAWHANDLE_MINI	Mini handle.
DRAWHANDLE_SMALL	Small handle.
DRAWHANDLE_MIDDLE	Middle handle.
DRAWHANDLE_BIG	Handle used by object generators and deformers.
DRAWHANDLE_CUSTOM	Custom handle.
DRAWHANDLE_POINTSIZE	Use the point size to draw the handle.
DRAWHANDLE_SELPOINTSIZE	Use the size of selected points to draw the handle.