磁盘序列号在每次软盘或硬盘格式化后都重新生成,并且不回重复。许多程序员用此加密。其实也可以修改该函数,可以得到磁盘卷标和文件系统类型信息。
声明:
Private Declare Function GetVolumeInformation Lib "kernel32.dll" Alias _
"GetVolumeInformationA" (ByVal lpRootPathName As String, ByVal _
lpVolumeNameBuffer As String, ByVal nVolumeNameSize As Integer, _
lpVolumeSerialNumber As Long, lpMaximumComponentLength As Long, _
lpFileSystemFlags As Long, ByVal lpFileSystemNameBuffer As String, _
ByVal nFileSystemNameSize As Long) As Long
代码:
Function GetSerialNumber(sRoot As String) As Long
Dim lSerialNum As Long
Dim R As Long
Dim strLabel As String, strType As String
strLabel = String$(255, Chr$(0))
'磁盘卷标
strType = String$(255, Chr$(0))
'文件系统类型 一般为 FAT
R = GetVolumeInformation(sRoot, strLabel, Len(strLabel), _
lSerialNum, 0, 0, strType, Len(strType))
GetSerialNumber = lSerialNum
'在 strLabel 中为 磁盘卷标
'在 strType 中为 文件系统类型
End Function
用法:
当驱动器不存在时,函数返回 0。如果是个非根目录,也将返回 0:
lSerial = GetSerialNumber("c:\")
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