声明:
    PrivateDeclareFunctionGetVolumeInformationLib"kernel32.dll"Alias"GetVolumeInformationA"(ByVallpRootPathNameAsString,ByVallpVolumeNameBufferAsString,ByValnVolumeNameSizeAsInteger,lpVolumeSerialNumberAsLong,lpMaximumComponentLengthAsLong,lpFileSystemFlagsAsLong,ByVallpFileSystemNameBufferAsString,ByValnFileSystemNameSizeAsLong)AsLong    
  代码:  
  FunctionGetSerialNumber(sRootAsString)AsLong
  DimlSerialNumAsLong
  DimRAsLong
  DimsTemp1AsString,sTemp2AsString
  strLabel=String$(255,Chr$(0))
  注释:磁盘卷标
  strType=String$(255,Chr$(0))
  注释:文件系统类型一般为FAT
  R=GetVolumeInformation(sRoot,strLabel,Len(strLabel),lSerialNum,0,0,strType,Len(strType))
  GetSerialNumber=lSerialNum
  注释:在strLabel中为磁盘卷标
  注释:在strType中为文件系统类型
  EndFunction      
  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:")->