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从指定的域中取得所有SQL服务器的清单
（作者： 2000年05月23日 09:46）
[程序语言] Microsoft Visual Basic 4.0,5.0,6.0
[运行平台] WINDOWS
[源码来源] http://codeguru.developer.com/vb/articles/1916.shtml
[功能描述]
想知道哪些NT机器上装了SQL服务器吗？ 使用NetServerEnum API时，我发现如下问题的解决方案，写出来给大家分享。该程序并不是返回服务器的清单，它只是进行 debug.print。
把下列代码贴到BAS模块中：
option Explicit
'
'
'
private Declare Function lstrlenW Lib "kernel32" (byval lpString as Long) as Long
'
private Declare Function NetServerEnum Lib "netapi32" ( _
strServername as Any, _
byval level as Long, _
bufptr as Long, _
byval prefmaxlen as Long, _
entriesread as Long, _
totalentries as Long, _
byval servertype as Long, _
strDomain as Any, _
resumehandle as Long) as Long
'
private Declare Function NetApiBufferFree Lib "Netapi32.dll" (byval lpBuffer as Long) as Long
'
private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination as Any, Source as Any, byval Length as Long)
'
private Const SV_TYPE_SERVER as Long = &H2
private Const SV_TYPE_SQLSERVER as Long = &H4
'
private Type SV_100
platform as Long
name as Long
End Type
'
'
public Sub GetSQLServers()
'
' You could change this to be a function returning
' a list of the SQL servers in a ADOR Recordset or an array etc.
'
' At present, it just does a debug.print of all the
' SQL servers on the network.
'
'
Dim l as Long
Dim entriesread as Long
Dim totalentries as Long
Dim hREsume as Long
Dim bufptr as Long
Dim level as Long
Dim prefmaxlen as Long
Dim lType as Long
Dim domain() as Byte
Dim i as Long
Dim sv100 as SV_100
'
level = 100
prefmaxlen = -1
'
lType = SV_TYPE_SQLSERVER
domain = "placeYourDomainNameHere" & vbNullChar
l = NetServerEnum(byval 0&, _
level, _
bufptr, _
prefmaxlen, _
entriesread, _
totalentries, _
lType, _
domain(0), _
hREsume)
If l = 0 Or l = 234& then
for i = 0 to entriesread - 1
CopyMemory sv100, byval bufptr, len(sv100)
Debug.print Pointer2stringw(sv100.name)
bufptr = bufptr + len(sv100)
next i
End If
NetApiBufferFree bufptr
'
End Sub
'
private Function Pointer2stringw(byval l as Long) as string
Dim buffer() as Byte
Dim nLen as Long
'
nLen = lstrlenW(l) * 2
If nLen then
ReDim buffer(0 to (nLen - 1)) as Byte
CopyMemory buffer(0), byval l, nLen
Pointer2stringw = buffer
End If
End Function
'
'
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