Each interactive C/Base program has a helpfile that provides on-line, context sensitive help on the screen whenever the operator presses the HELP key or the key sequence <F1> H. These helpfiles are in the help subdirectory of the C/Base administrative directory (usually \cbase\lib\cbase, see cbasedir(C-3) and helpdir(C-3)). Each helpfile has the same name as the corresponding program. These helpfiles are the default helpfiles for all C/Base programs and should not be changed. You can provide customized helpfiles for any formfile, menufile or when using view in a C program. For more information on view, see C/Base International Utilities Manual Chapter 3, View Programming Guide.