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   static extern bool GetDiskFreeSpaceEx(string lpDirectoryName,

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    <DllImport("coredll.dll", EntryPoint:="GetDiskFreeSpaceEx", SetLastError:=True, CharSet:=CharSet.Auto)> _

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    Private Shared Function GetDiskFreeSpaceEx( _

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   Private Declare Function GetDiskFreeSpaceEx _

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   Alias "GetDiskFreeSpaceExA" _

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        iret = GetDiskFreeSpaceEx("\", Freebytes, TotalBytes, TotalFreebytes)

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bool success = GetDiskFreeSpaceEx("C:\\", out FreeBytesAvailable, out TotalNumberOfBytes,

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Documentation

[GetDiskFreeSpaceEx] on MSDN

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   static extern bool GetDiskFreeSpaceEx(string lpDirectoryName,

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bool success = GetDiskFreeSpaceEx("C:\\", out FreeBytesAvailable, out TotalNumberOfBytes,

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   static extern bool GetDiskFreeSpaceEx(string lpDirectoryName,

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Documentation

[GetDiskFreeSpaceEx] on MSDN

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   if (GetDiskFreeSpaceEx(folderName, out free, out dummy1, out dummy2))

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   static extern bool GetDiskFreeSpaceEx(string lpDirectoryName,

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bool success = GetDiskFreeSpaceEx("C:\\", out FreeBytesAvailable, out TotalNumberOfBytes,

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   static extern bool GetDiskFreeSpaceEx(string lpDirectoryName,

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Documentation

[GetDiskFreeSpaceEx] on MSDN

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   if (GetDiskFreeSpaceEx(folderName, out free, out dummy1, out dummy2))