FILENAME_SPACES

When this configuration variable is set to 1 (on, true, yes), filenames may contain embedded spaces and the runtime considers the last non-space character as the end of the name. The default is 1. When this configuration variable is set to 0 (off, false, no), then filenames may not contain embedded spaces and the name terminates at the first space character. For example:

C:\temp dir\my file name

is read as:

C:\temp

This affects the behavior of the library routines that take a filename as an argument: