MSC: void _makepath( char *path, char *drive, char *dir,
				char *fname, char *ext )


	- prototype in stdlib.h

	- creates fully qualified filename from parts
	- path = receives fully qualified filename created from the parts
	- drive = drive letter string, with or without the colon
	- dir = directory name;  both slashes '/' or '\' are allowed;
	  trailing slash is optional
	- fname = base file name w/o extension (max 8 bytes)
	- ext = file extension (max 3 bytes)

	- see	_splitpath()