DOCUMENT:Q223165 28-JUN-2001 [visualc] TITLE :FIX: GetIDsOfNames( ) Returns DISP_E_UNKNOWNNAME for Named Args PRODUCT :Microsoft C Compiler PROD/VER:WINDOWS:3.0 OPER/SYS: KEYWORDS:kbservicepack kbActiveX kbAutomation kbCOMt kbVC600bug kbATL300 kbATL300bug kbATL300fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - The Microsoft Active Template Library (ATL) 3.0, included with: - Microsoft Visual C++, 32-bit Enterprise Edition, version 6.0 - Microsoft Visual C++, 32-bit Professional Edition, version 6.0 - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 ------------------------------------------------------------------------------- SYMPTOMS ======== When calling IDispatch::GetIDsOfNames() for an ATL server and named arguments are passed in, you receive the following error: 0x80020006 (DISP_E_UNKNOWNNAME) If the client is Visual Basic and you call a method in an ATL server passing named arguments then you receive this error message: Run-time error '448': Named argument not found CAUSE ===== In the function CComTypeInfoHolder::GetIDsOfNames() (called by IDispatch::GetIDsOfNames()), ATL looks up the DISPID through a cached array. If the call to GetIDsOfNames() includes named arguments then these entries are not in the array. In that case, CComTypeInfoHolder::GetIDsOfNames() delegates to ITypeInfo::GetIDsOfNames(). It calls ITypeInfo::GetIDsOfNames() once for each named argument in the method. To get the IDs of named arguments then ITypeInfo::GetIDsOfNames() needs to be called with the method name in addition to the named arguments. RESOLUTION ========== This bug has been fixed in Visual Studio 6.0 Service Pack 3. STATUS ====== Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug was corrected in Visual Studio 6.0 Service Pack 3. For more information about Visual Studio service packs, please see the following articles in the Microsoft Knowledge Base: Q194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why Q194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed Additional query words: ====================================================================== Keywords : kbservicepack kbActiveX kbAutomation kbCOMt kbVC600bug kbATL300 kbATL300bug kbATL300fix kbVS600sp2bug kbFAQ kbVS600sp3fix kbVS600SP1bug kbGrpDSMFCATL Technology : kbVCsearch kbAudDeveloper kbATLsearch Version : WINDOWS:3.0 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.