VB连接SQL数据库驱动部分

Attribute VB_Name = "Data_SQL"
Public conn As ADODB.Connection
Public rs As ADODB.Recordset
'Dim proc As New ADODB.Command
Public addFlag As Boolean      '声明部分


Public Function OpenCn(ByVal Cip As String, ByVal DBName As String, ByVal users As String, ByVal pw As String) As Boolean '连接模块 填写数据库等信息
Dim mag As String
On Error GoTo strerrmag
Set conn = New ADODB.Connection
conn.ConnectionTimeout = 25
conn.Provider = "sqloledb"
conn.Properties("data source").Value = Cip     '服务器的名字
conn.Properties("initial catalog").Value = DBName          '库名
'conn.Properties("integrated security").Value = "SSPI"      '登陆类型
conn.Properties("user id").Value = users 'SQL库名
conn.Properties("password").Value = pw '密码
'sql = "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;password=;Initial Catalog=pubs;Data Source=127.0.0.1"    '如果不用这个模块也行可以，这一句便是常用的引擎。
'conn.ConnectionString = sql Data Source=.;Initial Catalog=Andon;User ID=sa
conn.Open
OpenCn = True
If conn.State = 1 Then addFlag = True
Exit Function
strerrmag:
mag = "Data can't connect"
Call MsgBox(mag, vbOKOnly, "Error:Data connect")
addFlag = False
Exit Function      '连接错误消息
End Function


'关闭数据库，释放连接
Public Sub cloCn()
On Error Resume Next
If conn.State <> adStateClosed Then conn.Close
Set conn = Nothing
End Sub


Public Function openRs(ByVal strsql As String) As Boolean      '连接数据库记录集
Dim mag As String
Dim rpy As Boolean
On Error GoTo strerrmag
     Set rs = New ADODB.Recordset
     If addFlag = False Then rpy = True
     With rs
     .ActiveConnection = conn
     .CursorLocation = adUseClient
     .CursorType = adOpenKeyset
     .LockType = adLockOptimistic
     .Open strsql
     End With
     addFlag = True
     openRs = True
     'End        '将记录集给rs
     Exit Function
strerrmag:
     mag = "data not connect"
     Call MsgBox(mag, vbOKOnly, "error:connect")
     openRs = False
     End
     'Exit Function '连接错误消息
End Function


Public Sub cloRs()
On Error Resume Next
If rs.State <> adStateClosed Then rs.Clone
Set rs = Nothing '释放记录集
End Sub