编写COM组件，将数据库链接的语句写成COM组件

打开VB，新建ActiveX Dll,将工程改名为COMConnection,类模块改名为class,在class的代码里写

Option Explicit

Public Function GetConn(m_objConn As Connection) As String
   
    On Error GoTo here
   
    Dim m_szConnstr As String
   
    m_szConnstr = "Provider=SQLOLEDB.1;Data Source=192.168.0.101;User ID=sa;Password=;Initial Catalog=aaa"
   
    m_objConn.Open m_szConnstr
   
    GetConn = "OK"
    Exit Function
   
here:
    GetConn = "open database is error.error id is " & err.Description

End Function

然后编译
Asp里这样用
<%
    dim obj,conn,msg
    set obj=server.create("COMConnection.class")
    set conn=server.create("adodb.connection")
    msg=obj.GetConn(conn)
    if msg="OK" then
        //这里写代码，conn已经打开数据库了
    else
        resposne.write msg   //出错了，显示出错信息
    end if
%>