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Dir Function

office 365 dev account|Last Updated: 1/23/2018
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Returns a String representing the name of a file, directory, or folder that matches a specified pattern or file attribute, or the volume label of a drive. SyntaxDir [ (pathname [ ,attributes ] ) ] The Dir function syntax has these parts:

PartDescription
pathnameOptional. String expression that specifies a file name — may include directory or folder, and drive. A zero-length string ("") is returned if pathname is not found.
attributesOptional. Constant ornumeric expression, whose sum specifies file attributes. If omitted, returns files that match pathname but have no attributes.

Settings The attributesargument settings are:

ConstantValueDescription
vbNormal0(Default) Specifies files with no attributes.
vbReadOnly1Specifies read-only files in addition to files with no attributes.
vbHidden2Specifies hidden files in addition to files with no attributes.
VbSystem4Specifies system files in addition to files with no attributes. Not available on the Macintosh.
vbVolume8Specifies volume label; if any other attributed is specified, vbVolume is ignored. Not available on the Macintosh.
vbDirectory16Specifies directories or folders in addition to files with no attributes.
vbAlias64Specified file name is an alias. Available only on the Macintosh.

Note These constants are specified by Visual Basic for Applications and can be used anywhere in your code in place of the actual values.

Remarks In Microsoft Windows, Dir supports the use of multiple character ( \* ) and single character ( ? ) wildcards to specify multiple files. On the Macintosh, these characters are treated as valid file name characters and can't be used as wildcards to specify multiple files. Since the Macintosh doesn't support the wildcards, use the file type to identify groups of files. You can use the MacID function to specify file type instead of using the file names. For example, the following statement returns the name of the first TEXT file in the current folder:

Dir("SomePath", MacID("TEXT"))

To iterate over all files in a folder, specify an empty string:

Dir("")

If you use the MacID function with Dir in Microsoft Windows, an error occurs. Any attribute value greater than 256 is considered a MacID value. You must specify pathname the first time you call the Dir function, or an error occurs. If you also specify file attributes, pathname must be included. Dir returns the first file name that matches pathname. To get any additional file names that match pathname, call Dir again with no arguments. When no more file names match, Dir returns a zero-length string (""). Once a zero-length string is returned, you must specify pathname in subsequent calls or an error occurs. You can change to a new pathname without retrieving all of the file names that match the current pathname. However, you can't call the Dir function recursively. Calling Dir with the vbDirectory attribute does not continually return subdirectories. With Excel for Mac 2016, the initial Dir function call will succeed. Subsequent calls to iterate through the specified directory will cause an error however. This is a known bug unfortunately.

Tip Because file names are retrieved in no particular order, you may want to store returned file names in an array, and then sort the array.

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