The INCLUDE statement inserts the contents of a specified text file where it is specified in the .DEF file. The inserted file must contain module statements as they would appear in the .DEF file in which they are being inserted.
Syntax
INCLUDE [[']]filename[[']]
Remarks
You can specify a path with the filename. Wildcards are not permitted. If filename contains a space (allowed under some installable systems), begins with a nonalphabetic character, or is a reserved word, enclose it in single or double quotation marks (' or ").
Multiple INCLUDE statements can appear in a .DEF file; each specifies a single insertion. INCLUDE statements can be nested up to 10 levels deep.