WNetOpenEnum VB声明 Declare Function WNetOpenEnum Lib "mpr.dll" Alias "WNetOpenEnumA" (ByVal dwScope As Long, ByVal dwType As Long, ByVal dwUsage As Long, lpNetResource As NETRESOURCE, lphEnum As Long) As Long 说明 启动对网络资源进行枚举的过程。这个函数会返回由WNetEnumResource函数用于枚举资源所用的一个句柄 返回值 Long,零表示成功。会设置GetLastError。如GetLastError是ERROR_EXTENDED_ERROR,则可用WNetGetLastError取得额外的错误信息 参数表 参数 类型及说明 dwScope Long,指定要枚举的资源范围。可设为下述常数之一: RESOURCE_CONNECTED 枚举已连接的资源(忽略dwUsage) RESOURCE_GLOBALNET 枚举所有资源 RESOURCE_REMEMBERED 只枚举永久性连接 dwType Long,下述常数之一 RESOURCE_ANY 枚举所有类型的网络资源 RESOURCE_DISK 枚举磁盘资源 RESOURCE_PRINT 枚举打印资源 dwUsage Long,可设为零,表示枚举所有资源;或设为下述常数的一个或两个: RESOURCEUSAGE_CONNECTABLE 只枚举那些能够连接的资源 RESOURCEUSAGE_CONTAINER 只枚举包含了其他资源的资源 lpNetResource NETRESOURCE,这个结构指定了一个容器资源。该函数会枚举包含于这里指定的某个指定资源内的资源。如设为NULL(把声明变成ByVal As Long),那么函数会枚举顶级网络资源。倘若在dwScope参数里没有指定RESOURCE_GLOBALNET,那么必须为NULL lphEnum Long,指定一个变量,用于装载一个枚举句柄。该句柄由WNetEnumResource函数使用。必须用WNetCloseEnum函数将其清除
Option ExplicitPrivate Const RESOURCE_CONNECTED As Long = &H1& Private Const RESOURCE_GLOBALNET As Long = &H2& Private Const RESOURCE_REMEMBERED As Long = &H3& Private Const RESOURCEDISPLAYTYPE_DIRECTORY& = &H9 Private Const RESOURCEDISPLAYTYPE_DOMAIN& = &H1 Private Const RESOURCEDISPLAYTYPE_FILE& = &H4 Private Const RESOURCEDISPLAYTYPE_GENERIC& = &H0 Private Const RESOURCEDISPLAYTYPE_GROUP& = &H5 Private Const RESOURCEDISPLAYTYPE_NETWORK& = &H6 Private Const RESOURCEDISPLAYTYPE_ROOT& = &H7 Private Const RESOURCEDISPLAYTYPE_SERVER& = &H2 Private Const RESOURCEDISPLAYTYPE_SHARE& = &H3 Private Const RESOURCEDISPLAYTYPE_SHAREADMIN& = &H8 Private Const RESOURCETYPE_ANY As Long = &H0& Private Const RESOURCETYPE_DISK As Long = &H1& Private Const RESOURCETYPE_PRINT As Long = &H2& Private Const RESOURCETYPE_UNKNOWN As Long = &HFFFF& Private Const RESOURCEUSAGE_ALL As Long = &H0& Private Const RESOURCEUSAGE_CONNECTABLE As Long = &H1& Private Const RESOURCEUSAGE_CONTAINER As Long = &H2& Private Const RESOURCEUSAGE_RESERVED As Long = &H80000000 Private Const NO_ERROR = 0 Private Const ERROR_MORE_DATA = 234 'L // dderror Private Const RESOURCE_ENUM_ALL As Long = &HFFFF Private Type NETRESOURCE dwScope As Long dwType As Long dwDisplayType As Long dwUsage As Long pLocalName As Long pRemoteName As Long pComment As Long pProvider As Long End Type Private Type NETRESOURCE_REAL dwScope As Long dwType As Long dwDisplayType As Long dwUsage As Long sLocalName As String sRemoteName As String sComment As String sProvider As String End Type Private Declare Function WNetAddConnection2 Lib "mpr.dll" Alias "WNetAddConnection2A" (lpNetResource As NETRESOURCE, ByVal lpPassword As String, ByVal lpUserName As String, ByVal dwFlags As Long) As Long Private Declare Function WNetOpenEnum Lib "mpr.dll" Alias "WNetOpenEnumA" (ByVal dwScope As Long, ByVal dwType As Long, ByVal dwUsage As Long, lpNetResource As Any, lphEnum As Long) As Long Private Declare Function WNetEnumResource Lib "mpr.dll" Alias "WNetEnumResourceA" (ByVal hEnum As Long, lpcCount As Long, lpBuffer As NETRESOURCE, lpBufferSize As Long) As Long Private Declare Function WNetCloseEnum Lib "mpr.dll" (ByVal hEnum As Long) As Long Private Declare Function VarPtrAny Lib "vb40032.dll" Alias "VarPtr" (lpObject As Any) As Long Private Declare Sub CopyMem Lib "kernel32" Alias "RtlMoveMemory" (lpTo As Any, lpFrom As Any, ByVal lLen As Long) Private Declare Sub CopyMemByPtr Lib "kernel32" Alias "RtlMoveMemory" (ByVal lpTo As Long, ByVal lpFrom As Long, ByVal lLen As Long) Private Declare Function lstrcpy Lib "kernel32" Alias "lstrcpyA" (ByVal lpString1 As String, ByVal lpString2 As Any) As Long Private Declare Function lstrlen Lib "kernel32" Alias "lstrlenA" (ByVal lpString As Any) As LongSub GetLocalInfo() Dim nodX As Node Const MAX_RESOURCES = 256 Const NOT_A_CONTAINER = -1 Dim bFirstTime As Boolean Dim lReturn As Long Dim hEnum As Long Dim lCount As Long Dim lMin As Long Dim lLength As Long Dim l As Long Dim lBufferSize As Long Dim lLastIndex As Long Dim uNetApi(0 To MAX_RESOURCES) As NETRESOURCE Dim uNet() As NETRESOURCE_REAL bFirstTime = True Do If bFirstTime Then lReturn = WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY, RESOURCEUSAGE_ALL, ByVal 0&, hEnum) bFirstTime = False Else If uNet(lLastIndex).dwUsage And RESOURCEUSAGE_CONTAINER Then lReturn = WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY, RESOURCEUSAGE_ALL, uNet(lLastIndex), hEnum) Else lReturn = NOT_A_CONTAINER hEnum = 0 End If lLastIndex = lLastIndex + 1 End If If lReturn = NO_ERROR Then lCount = RESOURCE_ENUM_ALL Do lBufferSize = UBound(uNetApi) * Len(uNetApi(0)) / 2 lReturn = WNetEnumResource(hEnum, lCount, uNetApi(0), lBufferSize) If lCount > 0 Then ReDim Preserve uNet(0 To lMin + lCount - 1) As NETRESOURCE_REAL For l = 0 To lCount - 1 'Each Resource will appear here as uNet(i) uNet(lMin + l).dwScope = uNetApi(l).dwScope uNet(lMin + l).dwType = uNetApi(l).dwType uNet(lMin + l).dwDisplayType = uNetApi(l).dwDisplayType uNet(lMin + l).dwUsage = uNetApi(l).dwUsage If uNetApi(l).pLocalName Then lLength = lstrlen(uNetApi(l).pLocalName) uNet(lMin + l).sLocalName = Space$(lLength) CopyMem ByVal uNet(lMin + l).sLocalName, ByVal uNetApi(l).pLocalName, lLength End If If uNetApi(l).pRemoteName Then lLength = lstrlen(uNetApi(l).pRemoteName) uNet(lMin + l).sRemoteName = Space$(lLength) CopyMem ByVal uNet(lMin + l).sRemoteName, ByVal uNetApi(l).pRemoteName, lLength End If If uNetApi(l).pComment Then lLength = lstrlen(uNetApi(l).pComment) uNet(lMin + l).sComment = Space$(lLength) CopyMem ByVal uNet(lMin + l).sComment, ByVal uNetApi(l).pComment, lLength End If If uNetApi(l).pProvider Then lLength = lstrlen(uNetApi(l).pProvider) uNet(lMin + l).sProvider = Space$(lLength) CopyMem ByVal uNet(lMin + l).sProvider, ByVal uNetApi(l).pProvider, lLength End If Next l End If lMin = lMin + lCount DoEvents Loop While lReturn = ERROR_MORE_DATA End If If hEnum Then l = WNetCloseEnum(hEnum) End If Loop While lLastIndex < lMin TrvComputer.Nodes.Add , , "R", "网络资源" If UBound(uNet) > 0 Then For l = 0 To UBound(uNet) Select Case uNet(l).dwDisplayType Case RESOURCEDISPLAYTYPE_DIRECTORY& ' Debug.Print "Directory...", Case RESOURCEDISPLAYTYPE_DOMAIN ' TrvComputer.Nodes.Add , , "R", "Domain..." & uNet(l).sRemoteName, 1 ' Debug.Print "Domain...", Case RESOURCEDISPLAYTYPE_FILE ' Debug.Print "File...", Case RESOURCEDISPLAYTYPE_GENERIC ' Debug.Print "Generic...", Case RESOURCEDISPLAYTYPE_GROUP ' Debug.Print "Group...", Case RESOURCEDISPLAYTYPE_NETWORK&
' Debug.Print "Network...", Case RESOURCEDISPLAYTYPE_ROOT& ' Debug.Print "Root...", Case RESOURCEDISPLAYTYPE_SERVER Set nodX = TrvComputer.Nodes.Add("R", tvwChild, "node" & l, uNet(l).sRemoteName) ' Debug.Print "Server...", Case RESOURCEDISPLAYTYPE_SHARE ' Debug.Print "Share...", Case RESOURCEDISPLAYTYPE_SHAREADMIN& ' Debug.Print "ShareAdmin...", End Select ' Debug.Print uNet(l).sRemoteName, uNet(l).sComment Next l End If nodX.EnsureVisible End SubPrivate Sub Form_Load() Call GetLocalInfo End Sub
Declare Function WNetOpenEnum Lib "mpr.dll" Alias "WNetOpenEnumA" (ByVal dwScope As Long, ByVal dwType As Long, ByVal dwUsage As Long, lpNetResource As NETRESOURCE, lphEnum As Long) As Long
说明
启动对网络资源进行枚举的过程。这个函数会返回由WNetEnumResource函数用于枚举资源所用的一个句柄
返回值
Long,零表示成功。会设置GetLastError。如GetLastError是ERROR_EXTENDED_ERROR,则可用WNetGetLastError取得额外的错误信息
参数表
参数 类型及说明
dwScope Long,指定要枚举的资源范围。可设为下述常数之一:
RESOURCE_CONNECTED 枚举已连接的资源(忽略dwUsage)
RESOURCE_GLOBALNET 枚举所有资源
RESOURCE_REMEMBERED 只枚举永久性连接
dwType Long,下述常数之一
RESOURCE_ANY 枚举所有类型的网络资源
RESOURCE_DISK 枚举磁盘资源
RESOURCE_PRINT 枚举打印资源
dwUsage Long,可设为零,表示枚举所有资源;或设为下述常数的一个或两个:
RESOURCEUSAGE_CONNECTABLE 只枚举那些能够连接的资源
RESOURCEUSAGE_CONTAINER 只枚举包含了其他资源的资源
lpNetResource NETRESOURCE,这个结构指定了一个容器资源。该函数会枚举包含于这里指定的某个指定资源内的资源。如设为NULL(把声明变成ByVal As Long),那么函数会枚举顶级网络资源。倘若在dwScope参数里没有指定RESOURCE_GLOBALNET,那么必须为NULL
lphEnum Long,指定一个变量,用于装载一个枚举句柄。该句柄由WNetEnumResource函数使用。必须用WNetCloseEnum函数将其清除
Private Const RESOURCE_GLOBALNET As Long = &H2&
Private Const RESOURCE_REMEMBERED As Long = &H3&
Private Const RESOURCEDISPLAYTYPE_DIRECTORY& = &H9
Private Const RESOURCEDISPLAYTYPE_DOMAIN& = &H1
Private Const RESOURCEDISPLAYTYPE_FILE& = &H4
Private Const RESOURCEDISPLAYTYPE_GENERIC& = &H0
Private Const RESOURCEDISPLAYTYPE_GROUP& = &H5
Private Const RESOURCEDISPLAYTYPE_NETWORK& = &H6
Private Const RESOURCEDISPLAYTYPE_ROOT& = &H7
Private Const RESOURCEDISPLAYTYPE_SERVER& = &H2
Private Const RESOURCEDISPLAYTYPE_SHARE& = &H3
Private Const RESOURCEDISPLAYTYPE_SHAREADMIN& = &H8
Private Const RESOURCETYPE_ANY As Long = &H0&
Private Const RESOURCETYPE_DISK As Long = &H1&
Private Const RESOURCETYPE_PRINT As Long = &H2&
Private Const RESOURCETYPE_UNKNOWN As Long = &HFFFF&
Private Const RESOURCEUSAGE_ALL As Long = &H0&
Private Const RESOURCEUSAGE_CONNECTABLE As Long = &H1&
Private Const RESOURCEUSAGE_CONTAINER As Long = &H2&
Private Const RESOURCEUSAGE_RESERVED As Long = &H80000000
Private Const NO_ERROR = 0
Private Const ERROR_MORE_DATA = 234 'L // dderror
Private Const RESOURCE_ENUM_ALL As Long = &HFFFF
Private Type NETRESOURCE
dwScope As Long
dwType As Long
dwDisplayType As Long
dwUsage As Long
pLocalName As Long
pRemoteName As Long
pComment As Long
pProvider As Long
End Type
Private Type NETRESOURCE_REAL
dwScope As Long
dwType As Long
dwDisplayType As Long
dwUsage As Long
sLocalName As String
sRemoteName As String
sComment As String
sProvider As String
End Type
Private Declare Function WNetAddConnection2 Lib "mpr.dll" Alias "WNetAddConnection2A" (lpNetResource As NETRESOURCE, ByVal lpPassword As String, ByVal lpUserName As String, ByVal dwFlags As Long) As Long
Private Declare Function WNetOpenEnum Lib "mpr.dll" Alias "WNetOpenEnumA" (ByVal dwScope As Long, ByVal dwType As Long, ByVal dwUsage As Long, lpNetResource As Any, lphEnum As Long) As Long
Private Declare Function WNetEnumResource Lib "mpr.dll" Alias "WNetEnumResourceA" (ByVal hEnum As Long, lpcCount As Long, lpBuffer As NETRESOURCE, lpBufferSize As Long) As Long
Private Declare Function WNetCloseEnum Lib "mpr.dll" (ByVal hEnum As Long) As Long
Private Declare Function VarPtrAny Lib "vb40032.dll" Alias "VarPtr" (lpObject As Any) As Long
Private Declare Sub CopyMem Lib "kernel32" Alias "RtlMoveMemory" (lpTo As Any, lpFrom As Any, ByVal lLen As Long)
Private Declare Sub CopyMemByPtr Lib "kernel32" Alias "RtlMoveMemory" (ByVal lpTo As Long, ByVal lpFrom As Long, ByVal lLen As Long)
Private Declare Function lstrcpy Lib "kernel32" Alias "lstrcpyA" (ByVal lpString1 As String, ByVal lpString2 As Any) As Long
Private Declare Function lstrlen Lib "kernel32" Alias "lstrlenA" (ByVal lpString As Any) As LongSub GetLocalInfo()
Dim nodX As Node
Const MAX_RESOURCES = 256
Const NOT_A_CONTAINER = -1
Dim bFirstTime As Boolean
Dim lReturn As Long
Dim hEnum As Long
Dim lCount As Long
Dim lMin As Long
Dim lLength As Long
Dim l As Long
Dim lBufferSize As Long
Dim lLastIndex As Long
Dim uNetApi(0 To MAX_RESOURCES) As NETRESOURCE
Dim uNet() As NETRESOURCE_REAL
bFirstTime = True
Do
If bFirstTime Then
lReturn = WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY, RESOURCEUSAGE_ALL, ByVal 0&, hEnum)
bFirstTime = False
Else
If uNet(lLastIndex).dwUsage And RESOURCEUSAGE_CONTAINER Then
lReturn = WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY, RESOURCEUSAGE_ALL, uNet(lLastIndex), hEnum)
Else
lReturn = NOT_A_CONTAINER
hEnum = 0
End If
lLastIndex = lLastIndex + 1
End If
If lReturn = NO_ERROR Then
lCount = RESOURCE_ENUM_ALL
Do
lBufferSize = UBound(uNetApi) * Len(uNetApi(0)) / 2
lReturn = WNetEnumResource(hEnum, lCount, uNetApi(0), lBufferSize)
If lCount > 0 Then
ReDim Preserve uNet(0 To lMin + lCount - 1) As NETRESOURCE_REAL
For l = 0 To lCount - 1
'Each Resource will appear here as uNet(i)
uNet(lMin + l).dwScope = uNetApi(l).dwScope
uNet(lMin + l).dwType = uNetApi(l).dwType
uNet(lMin + l).dwDisplayType = uNetApi(l).dwDisplayType
uNet(lMin + l).dwUsage = uNetApi(l).dwUsage
If uNetApi(l).pLocalName Then
lLength = lstrlen(uNetApi(l).pLocalName)
uNet(lMin + l).sLocalName = Space$(lLength)
CopyMem ByVal uNet(lMin + l).sLocalName, ByVal uNetApi(l).pLocalName, lLength
End If
If uNetApi(l).pRemoteName Then
lLength = lstrlen(uNetApi(l).pRemoteName)
uNet(lMin + l).sRemoteName = Space$(lLength)
CopyMem ByVal uNet(lMin + l).sRemoteName, ByVal uNetApi(l).pRemoteName, lLength
End If
If uNetApi(l).pComment Then
lLength = lstrlen(uNetApi(l).pComment)
uNet(lMin + l).sComment = Space$(lLength)
CopyMem ByVal uNet(lMin + l).sComment, ByVal uNetApi(l).pComment, lLength
End If
If uNetApi(l).pProvider Then
lLength = lstrlen(uNetApi(l).pProvider)
uNet(lMin + l).sProvider = Space$(lLength)
CopyMem ByVal uNet(lMin + l).sProvider, ByVal uNetApi(l).pProvider, lLength
End If
Next l
End If
lMin = lMin + lCount
DoEvents
Loop While lReturn = ERROR_MORE_DATA
End If
If hEnum Then
l = WNetCloseEnum(hEnum)
End If
Loop While lLastIndex < lMin
TrvComputer.Nodes.Add , , "R", "网络资源"
If UBound(uNet) > 0 Then
For l = 0 To UBound(uNet)
Select Case uNet(l).dwDisplayType
Case RESOURCEDISPLAYTYPE_DIRECTORY&
' Debug.Print "Directory...",
Case RESOURCEDISPLAYTYPE_DOMAIN
' TrvComputer.Nodes.Add , , "R", "Domain..." & uNet(l).sRemoteName, 1
' Debug.Print "Domain...",
Case RESOURCEDISPLAYTYPE_FILE
' Debug.Print "File...",
Case RESOURCEDISPLAYTYPE_GENERIC
' Debug.Print "Generic...",
Case RESOURCEDISPLAYTYPE_GROUP
' Debug.Print "Group...",
Case RESOURCEDISPLAYTYPE_NETWORK&
' Debug.Print "Network...",
Case RESOURCEDISPLAYTYPE_ROOT&
' Debug.Print "Root...",
Case RESOURCEDISPLAYTYPE_SERVER
Set nodX = TrvComputer.Nodes.Add("R", tvwChild, "node" & l, uNet(l).sRemoteName)
' Debug.Print "Server...",
Case RESOURCEDISPLAYTYPE_SHARE
' Debug.Print "Share...",
Case RESOURCEDISPLAYTYPE_SHAREADMIN&
' Debug.Print "ShareAdmin...",
End Select
' Debug.Print uNet(l).sRemoteName, uNet(l).sComment
Next l
End If
nodX.EnsureVisible
End SubPrivate Sub Form_Load()
Call GetLocalInfo
End Sub