vb如何判断系统是否安装sqlserver
本人在网上查了有人通过API来判断' Dim sss As String
' ''//先引用[Registry Access Functions]
'
' key_ok = Registry.GetKeyValue(HKEY_LOCAL_MACHINE, "SOFTWARE\Microsoft\MSSQLServer\MSSQLServer\CurrentVersion", "SerialNumber", sss)
' If key_ok Then MsgBox "读取成功"
' If sss <> "" Then MsgBox "该键值存在"
'
' End Sub
但不知道引用哪些API ,如何调用，本人才疏学浅，请高手给个完整的例子，再此叩谢 就是读取注册表 哈,忘记了,以前看到过个代码可以枚举所有可访问网络中的SQL SERVER,楼主股沟一下试试吧 能有完整的代码吗，谢谢，急盼！不要嫌分少，就这么多了 http://database.51cto.com/art/201010/230736.htm 楼主说系统是否安装，不是网络上是否安装
网络能查到,本机当然也行. 如何枚举本地网络中的 SQL Server 服务器 我能想到的办法就是去连接那个数据库 从注册表中判断就可以了 Registry.bas
Attribute VB_Name = "Registry"应该读下注册就OK了。
' -----------------
' ADVAPI32
' -----------------
' function prototypes, constants, and type definitions
' for Windows 32-bit Registry API
Public Const HKEY_CLASSES_ROOT = &H80000000
Public Const HKEY_CURRENT_USER = &H80000001
Public Const HKEY_LOCAL_MACHINE = &H80000002
Public Const HKEY_USERS = &H80000003
Public Const HKEY_PERFORMANCE_DATA = &H80000004
Public Const ERROR_SUCCESS = 0&
' Registry API prototypes
Declare Function RegCloseKey Lib "advapi32.dll" (ByVal Hkey As Long) As Long
Declare Function RegCreateKey Lib "advapi32.dll" Alias "RegCreateKeyA" (ByVal Hkey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
Declare Function RegDeleteKey Lib "advapi32.dll" Alias "RegDeleteKeyA" (ByVal Hkey As Long, ByVal lpSubKey As String) As Long
Declare Function RegDeleteValue Lib "advapi32.dll" Alias "RegDeleteValueA" (ByVal Hkey As Long, ByVal lpValueName As String) As Long
Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpenKeyA" (ByVal Hkey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
Declare Function RegQueryValueEx Lib "advapi32.dll" Alias "RegQueryValueExA" (ByVal Hkey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, lpData As Any, lpcbData As Long) As Long
Declare Function RegSetValueEx Lib "advapi32.dll" Alias "RegSetValueExA" (ByVal Hkey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, lpData As Any, ByVal cbData As Long) As Long
Public Const REG_SZ = 1 ' Unicode nul terminated string
Public Const REG_DWORD = 4 ' 32-bit number
Public Sub SaveKey(Hkey As Long, strPath As String)
Dim keyhand as long
r = RegCreateKey(Hkey, strPath, keyhand)
r = RegCloseKey(keyhand)
End Sub
Public Function GetString(Hkey As Long, strPath As String, strValue As String)
Dim keyhand As Long
Dim datatype As Long
Dim lResult As Long
Dim strBuf As String
Dim lDataBufSize As Long
Dim intZeroPos As Integer
r = RegOpenKey(Hkey, strPath, keyhand)
lResult = RegQueryValueEx(keyhand, strValue, 0&, lValueType, ByVal 0&, lDataBufSize)
If lValueType = REG_SZ Then
strBuf = String(lDataBufSize, " ")
lResult = RegQueryValueEx(keyhand, strValue, 0&, 0&, ByVal strBuf, lDataBufSize)
If lResult = ERROR_SUCCESS Then
intZeroPos = InStr(strBuf, Chr$(0))
If intZeroPos > 0 Then
GetString = Left$(strBuf, intZeroPos - 1)
Else
GetString = strBuf
End If
End If
End If
r = RegCloseKey(keyhand)
End Function
Public Sub SaveString(Hkey As Long, strPath As String, strValue As String, strdata As String)
Dim keyhand As Long
Dim r As Long
r = RegCreateKey(Hkey, strPath, keyhand)
r = RegSetValueEx(keyhand, strValue, 0, REG_SZ, ByVal strdata, Len(strdata))
r = RegCloseKey(keyhand)
End Sub
Function GetDword(ByVal Hkey As Long, ByVal strPath As String, ByVal strValueName As String) As Long
Dim lResult As Long
Dim lValueType As Long
Dim lBuf As Long
Dim lDataBufSize As Long
Dim r As Long
Dim keyhand As Long
r = RegOpenKey(Hkey, strPath, keyhand)
' Get length/data type
lDataBufSize = 4
lResult = RegQueryValueEx(keyhand, strValueName, 0&, lValueType, lBuf, lDataBufSize)
If lResult = ERROR_SUCCESS Then
If lValueType = REG_DWORD Then
GetDword = lBuf
End If
' Else
' Call errlog("GetDword-" & strPath, False)
End If
r = RegCloseKey(keyhand)
End Function
Function SaveDword(ByVal Hkey As Long, ByVal strPath As String, ByVal strValueName As String, ByVal lData As Long)
Dim lResult As Long
Dim keyhand As Long
Dim r As Long
r = RegCreateKey(Hkey, strPath, keyhand)
lResult = RegSetValueEx(keyhand, strValueName, 0&, REG_DWORD, lData, 4)
'If lResult <> error_success Then Call errlog("SetDWORD", False)
r = RegCloseKey(keyhand)
End Function
Public Function DeleteKey(ByVal Hkey As Long, ByVal strKey As String)
Dim r As Long
r = RegDeleteKey(Hkey, strKey)
End Function
Public Function DeleteValue(ByVal Hkey As Long, ByVal strPath As String, ByVal strValue As String)
Dim keyhand As Long
r = RegOpenKey(Hkey, strPath, keyhand)
r = RegDeleteValue(keyhand, strValue)
r = RegCloseKey(keyhand)
End Function
补充：VB , API
