调用API函数得到磁盘上剩余空间的值

最直接的方法是调用API函数 GetDiskFreeSpace,函数声明如下:

声明：Declare Function GetDiskFreeSpace Lib "kernel32" Alias "GetDiskFreeSpaceA" (ByVal lpRootPathName As String, lpSectorsPerCluster As Long, lpBytesPerSector As Long, lpNumberOfFreeClusters As Long, lpTtoalNumberOfClusters As Long) As Long使用：Private Sub Form_Load()'VB Man 2001'URL: http://goodvbman.yeah.net'E-Mail: coolde@21cn.comDim Sectors as Long,Bytes as Long,FreeC as Long, TotalC as Long,Total as Long,Freeb as Long'Retrieve information about the C:/GetDiskFreeSpace "C:/", Sectors, Bytes, Freec, Totalc'Set graphic mode to persistentMe.AutoRedraw = True'Print the information to the formMe.Print " Path: C:/"Me.Print " Sectors per Cluster:" + Str$(Sector)Me.Print " Bytes per sector:" + Str$(Bytes)Me.Print " Number Of Free Clusters:" + Str$(Freec)Me.Print " Total Number Of Clusters:" + Str$(Totalc)Total = rTotalc& * rSector& * rBytes&Me.Print " Total number of bytes in path:" + Str$(Total)Freeb = rFreec& * rSector& * rBytes&Me.Print " Free bytes:" + Str$(Freeb)End sub