如何利用coledispatchdriver使用ado

[落伍者]

COleDispatchDriver Cn,Rs,;
COleException *e=new COleException;
Cn.CreateDispatch ("ADODB.Connection",e);
Rs.CreateDispatch ("ADODB.RecordSet",e);

static BYTE params[]=VTS_BSTR VTS_BSTR VTS_BSTR VTS_I4 ;
static BYTE params1[]=VTS_VARIANT VTS_VARIANT VTS_I4 VTS_I4 VTS_I4;
Cn.InvokeHelper(0x0a,DISPATCH_METHOD,VT_EMPTY,NULL,params,"DSN=Dbtest","","",(long)-1);
Rs.InvokeHelper (0x03fe,DISPATCH_METHOD,VT_EMPTY,NULL,params1,"Select * from UserTb",Cn ,(long)3,(long)3,(long)-1); //执行到这一行时提示
unhandle exception in msado15.dll 0xc000005:acess violation
请问如何解决这个问题

[蒋晟]

你不会catch它么？
去看
MSDN
Visual C++ Concepts: Adding Functionality
Exception Handling (MFC)
Exceptions: OLE Exceptions