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 DIRNAME()
 Determines the name of the current directory
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 Syntax

     DIRNAME([<cDrive>]) --> cDirectory

 Argument

     <cDrive>  Designates the drive for which the current directory is
     determined (a colon is unnecessary).  The default is the current drive.

 Returns

     DIRNAME() returns the current directory name on the <cDrive>.

 Description

     DIRNAME() determines the current directory name on the selected drive.
     You can use this function to construct complete access paths.

 Notes

     .  The maximum length of the returned value is 65 characters.  If
        no drive designator is specified, the current drive is assumed.

     .  If there is an invalid drive designation, DIRNAME() returns a
        null string.

 Examples

     .  Display the current directory name:

        ? "Current Directory:  " + DIRNAME()

     .  With a drive designator:

        ? DIRNAME("A")               // Current directory on Drive A: