首先要安装ORACLE客户端或服务器端,建好DB以及SERVICE,连接成功后就可以开始了,以下是VB访问ORACLE的代码:
Option Explicit
'以下是一些变量以及参数的定义
'DB的名称
Public Const strdbname = "DBNAME"
'用户名
Public Const strusr = "BLUESKY35"
'密码
Public Const strpwd = "PASSWORD"
'OraSession
Public OraSession As Object
'OraDatabase
Public OraDB As OraDatabase
'OraDynaset
Public OraDyn As OraDynaset
'连接ORACLE的函数
'连接成功:true 连接失败:false
Public Function f_connect() As Boolean
On Error GoTo ierr
f_connect = False
Set OraSession = CreateObject("OracleInProcServer.XOraSession")
Set OraDB = OraSession.OpenDatabase(strdbname, strusr & "/" & strpwd, 0&)
f_connect = True
Exit Function
ierr:
MsgBox Err.Description, vbOKOnly + vbCritical, "Error"
f_connect = False
End Function
'通过传入SQL语句从数据库的表里取得记录
Public Function f_select(strsql As String) As OraDynaset
On Error GoTo ierr
Set OraDyn = OraDB.CreateDynaset(strsql, ORADYN_READONLY)
Set f_select = OraDyn
Exit Function
ierr:
MsgBox Err.Description, vbOKOnly + vbCritical, "Error"
Set f_select = Nothing
End Function
'执行更新语句,返回受本次更新影响的记录数
Public Function f_execute(strsql As String) As Boolean
On Error GoTo ierr
f_execute = False
OraDB.BeginTrans
f_execute = OraDB.ExecuteSQL(strsql)
Exit Function
ierr:
MsgBox Err.Description, vbOKOnly + vbCritical, "Error"
OraDB.Rollback
End Function
'断开连接
'断开成功:true 断开失败:false
Public Function f_disconnect() As Boolean
On Error GoTo ierr
f_disconnect = False
If Not OraDyn Is Nothing Then
OraDyn.Close
End If
Set OraSession = Nothing
OraDB.Close
Set OraDB = Nothing
f_disconnect = True
Exit Function
ierr:
MsgBox Err.Description, vbOKOnly + vbCritical, "Error"
f_disconnect = False
End Function
将以上代码放入模块,直接调用即可. 
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