| Class  | Description  | 
| CgArc  | Specifies the integer coordinates and angles of an arc.  | 
| CgCharStruct  | Specifies properties of individual characters, including height, width, and offset.  | 
| CgFontProp  | Specifies an extra property of a font such as its name or its spacing.  | 
| CgID  | Abstract class of server resources, including CgDrawable, CgCursor, CgFont.  | 
| CgLogicalFontDescription  | Specifies a data structure used to assist in parsing font names.  | 
| CgRegion  | Specifies a geometric region consisting of a set of rectangles.  | 
| CgSegment  | Specifies the integer coordinates of a line segment.  | 
| CgVisual  | Specifies visual properties of a screen.  |