Many DOS-based C programmers are expanding their palette of programming skills to write programs for OS/2 2.1 Presentation Manager. Many others would do the same if they did not have to recode all their DOS applications from scratch. This book/disk package means they do not have to. Using the development of an original game program as a working example, Dorfman shows how programmers can port C code written for DOS to the graphical environment of OS/2. Readers receive instructions for porting programs to OS/2 and writing platform-independent code that will work in both DOS and OS/2. The accompanying disk includes complete code for DOS and OS/2 versions of the sample game program, which actually functions.