Naming a File
Although each file system can have specific rules about the formation of individual components in a directory or file name, all file systems follow the same general conventions: a base file name and an optional extension, separated by a period. For example, the MS-DOS FAT file system supports 8 characters for the base file name and 3 characters for the extension. This is known as an 8.3 file name. The FAT file system and NTFS support file names that can be up to 255 characters long. This is known as a long file name. To get an MS-DOS file name given a long file name, use the GetShortPathName function. To get the full path of a file, use the GetFullPathName function.
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