Specifying an Inline File
Specify two angle brackets (<<) in the command where filename is to appear. The angle brackets cannot be a macro expansion.
When the command is run, the angle brackets are replaced by filename, if specified, or by a unique NMAKE-generated name. If specified, filename must follow angle brackets without a space or tab. A path is permitted. No extension is required or assumed. If filename is specified, the file is created in the current or specified directory, overwriting any existing file by that name; otherwise, it is created in the TMP directory (or the current directory, if the TMP environment variable is not defined). If a previous filename is reused, NMAKE replaces the previous file.