This book describes the concepts associated with graphical output-- presentation spaces, device contexts, graphic primitives, fonts--and how to prepare graphical output for display and printing. It provides the C-language syntax for all the graphical programming interface (GPI), including input and output parameters, data structures, data types, return codes, and example codes. Guidance information is also provided to assist you in developing applications using these items. GPI functions (indicated by the prefix "Gpi") are listed in alphabetic order.