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    fMaxUnit()

         Returns the number of logic DOS drives

    Syntax:

         fMaxUnit() -> nDrives

    Description:

         Returns the number of logic DOS drives. Frequently, if a Novell
         net exists a return of 32 is common. Under native DOS a return of 5
         or the value of LASTDRIVE, which ever is greater.

    Return:

         The number of logic DOS drives.

    Example:

         nDrives := Str ( fMaxUnit () )
         ? "I have " + nDrives + " on my system."
See Also: fDefUnit()
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