Before the help file can be displayed in a window, it must be read into memory using mf_rd(). This can be done either at the beginning of a program or whenever the file is requested.
Multiple help files can be read in all at once or when requested. If you plan to read files in as requested, you will need only one memory file. Free the contents of the file with mf_clr() each time you have finished displaying a requested file. To minimize heap fragmentation, we do not recommend calling mf_rd() more than once.
See Chapter 45, "Creating and Viewing Memory Files" for information on managing memory files.
