getting all SQLServers in your domain

[Lothar Haensler]

ever wanted to know which NT machines are used as SQLServers?
When playing around with the NetServerEnum API I found the following solution that I just wanted to share.


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

private Sub Command1_Click()
Dim l as Long
Dim entriesread as Long
Dim totalentries as Long
Dim hREsume as Long
Dim bufptr as Long
Dim level as Long
level = 100
Dim prefmaxlen as Long
prefmaxlen = -1
Dim lType as Long
lType = SV_TYPE_SQLSERVER
Dim domain() as Byte
Dim sv100 as SV_100
domain = "placeYourDomainNameHere" & vbNullChar
l = NetServerEnum(byval 0&, _
level, _
bufptr, _
prefmaxlen, _
entriesread, _
totalentries, _
lType, _
domain(0), _
hREsume)
If l = 0 Or l = 234& then
Dim i as Long
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




(if you run that code within in your own network you might be as surprised as I was, when you find how many SQLServers are installed! :-))

[Crazy D @ Work]

Hey tnx Lothar, nice job :-)

Crazy D @ Work :-)

[Chris Eastwood]

Nice one Lothar - want me to post it as an article on the site ?


Chris Eastwood

CodeGuru - the website for developers
http://codeguru.developer.com/vb

[Lothar Haensler]

go ahead, Chris.

[Chris Eastwood]

Hi Lothar

I've posted this one too :

http://codeguru.developer.com/vb/articles/1916.shtml


Chris Eastwood

CodeGuru - the website for developers
http://codeguru.developer.com/vb