FIX: Visual C++ 5.0 #import Causes Errors with ADO Version 2.0
Article ID: 190726
Article Last Modified on 11/18/2003
APPLIES TO
- Microsoft Visual C++ 5.0 Enterprise Edition
- Microsoft Visual C++ 5.0 Professional Edition
- Microsoft ActiveX Data Objects 2.0
This article was previously published under Q190726
SYMPTOMS
On a clean Windows 95 or Windows 98 machine with DCOM95 or DCOM98
installed, compile the following in a .cpp file:
#import "c:\program files\common files\system\ado\msado15.dll"
RESULT: You get the following error messages:
error C2504: '_Connection15' : base class undefined
error C2504: '_Recordset15' : base class undefined
error C2504: 'Fields15' : base class undefined
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Connection *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::_Recordset *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::Fields *const ' to 'struct IUnknown *'
error C2664: '_com_issue_errorex' : cannot convert parameter 2 from
'struct ADODB::Fields *const ' to 'struct IUnknown *'
This problem also occurs on Windows NT 4.0, and the resolution given
applies.
CAUSE
This is a problem in the #import feature of the compiler.
RESOLUTION
To work around this problem, use one of the following alternatives:
- Install Visual Studio 97, Service Pack 3.
- Upgrade to Visual C++, version 6.0.
- Modify the resultant .tlh file by moving each of the declarations for
_Connection15, _Recordset15, and Field15
Connection, Recordset, and Field.
STATUS
Microsoft has confirmed this to be a bug in the Microsoft products
listed at the beginning of this article. The problem has been corrected in Visual Studio 97, Service Pack 3, and also in Visual C++ version 6.0.
REFERENCES
For additional information about how to obtain Visual Studio 97, Service Pack 3, please see the following
article in the Microsoft Knowledge Base:
170365 Visual Studio 97 Service Packs - What, Where, and Why
Keywords: kberrmsg kbbug kbfix kbvc600fix KB190726