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Puzzle 16
Serially Speaking |
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One of the most common questions I receive relates to retrieving a disk volume serial number. This can be done using the GetVolumeInformation function, which is defined in the Win32 SDK documentation as follows: |
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BOOL GetVolumeInformation(
LPCTSTR lpRootPathName, // address of root directory of the
// file system
LPTSTR lpVolumeNameBuffer, // address of name of the volume
DWORD nVolumeNameSize, // length of lpVolumeNameBuffer
LPDWORD lpVolumeSerialNumber, // address of volume serial number
LPDWORD lpMaximumComponentLength, // address of system's maximum
// filename length
LPDWORD lpFileSystemFlags, // address of file system flags
LPTSTR lpFileSystemNameBuffer, // address of name of file system
DWORD nFileSystemNameSize // length of lpFileSystemNameBuffer
); |
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Like many API functions, these parameters are almost self-explanatory. The lpRootPathName parameter should contain the root directory of the volume for which you want to obtain information. The following sample program has a drive control that allows you to select a drive to check. It then displays the volume name, file system name, maximum file-name length, and serial number in a list box. |
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' Volume Information
' Copyright © 1998 by Desaware Inc. All Rights Reserved
Option Explicit
Private Declare Function GetVolumeInformation Lib "kernel32" _
Alias "GetVolumeInformationA" (ByVal lpRootPathName As String, _
ByVal lpVolumeNameBuffer As String, ByVal nVolumeNameSize As Long, _
ByVal lpVolumeSerialNumber As Long, ByVal lpMaximumComponentLength _
As Long, ByVal lpFileSystemFlags As Long, ByVal _
lpFileSystemNameBuffer As String, ByVal nFileSystemNameSize As Long) As Long |
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