source: Include/Classes/System/IO/DriveInfo.ab@ 111

Enum DriveType
    Unknown = 0
    NoRootDirectory
    Removable
    Fixed
    CDRom
    Network
    Ram
End Enum

Class DriveInfo
    m_DriveName As String
Public
    Sub DriveInfo(driveName As String)
        If driveName.Length <> 1 Then
            'ArgumentException
            debug
        End If
        driveName.ToUpper()
        m_DriveName = driveName + ":\"
    End Sub

    Sub ~DriveInfo()
    End Sub

    'property
    Function AvailableFreeSpace() As QWord
        Dim availableFreeSpace As ULARGE_INTEGER
        If GetDiskFreeSpaceEx(m_DriveName, availableFreeSpace, ByVal 0, ByVal 0) Then
            Return (availableFreeSpace.HighPart << 32) Or availableFreeSpace.LowPart
        Else
            'IOException
        End If
    End Function

    Function DriveFormat() As String
        Dim systemName As String
        systemName.ReSize(15)
        If GetVolumeInformation(m_DriveName, NULL, NULL, NULL, NULL, NULL, systemName, 16) Then
            Return systemName
        Else
            'IOException
        End If
    End Function

    Function DriveType() As Long
        Return GetDriveType(m_DriveName)
    End Function

    Function IsReady() As BOOL
        If GetVolumeInformation(m_DriveName, NULL, NULL, NULL, NULL, NULL, NULL, NULL) Then
            Return _System_TRUE
        Else
            Return _System_FALSE
        End If
    End Function

    Function Name() As String
        Return m_DriveName
    End Function

/*  Function RootDirectory() As DirectoryInfo
    End Function*/

    Function TotalFreeSpace() As QWord
        Dim totalFreeSpace As ULARGE_INTEGER
        If GetDiskFreeSpaceEx(m_DriveName, ByVal 0, ByVal 0, totalFreeSpace) Then
            Return (totalFreeSpace.HighPart << 32) Or totalFreeSpace.LowPart
        Else
            'IOException
        End If
    End Function

    Function TotalSize() As QWord
        Dim totalSize As ULARGE_INTEGER
        If GetDiskFreeSpaceEx(m_DriveName, ByVal 0, totalSize, ByVal 0) Then
            Return (totalSize.HighPart << 32) Or totalSize.LowPart
        Else
            'IOException
        End If
    End Function

    Function VolumeLabel() As String
        Dim volumeName As String
        volumeName.ReSize(63)
        If GetVolumeInformation(m_DriveName, volumeName, 64, NULL, NULL, NULL, NULL, NULL) Then
            Return volumeName
        Else
            'IOException
        End If
    End Function
End Class