topic Re: QueryInterface() problem in ObjectARX Forum

QueryInterface() problem

Anonymous — Thu, 10 May 2007 08:33:04 GMT

Hi,

After migration to ObjectARX 2007 I have troubles retrieving IAcadApplication interface to add menu items. The code looks something like this:

CComPtr< IDispatch > pAcadDisp = NULL;
pAcadDisp = acedGetAcadWinApp()->GetIDispatch(TRUE);

CComPtr< IAcadApplication > pAcad;
hr = pAcadDisp->QueryInterface(IID_IAcadApplication, (void**)&pAcad); // fails here with HRESULT of E_NOINTERFACE

I have checked IID_IAcadApplicatio identifier and it seems that I get one that is specified in ObjectARX 2004.
2007 version:
MIDL_DEFINE_GUID(IID, IID_IAcadApplication,0x8F17437C,0x2EFB,0x4FC4,0x81,0x88,0xEE,0xFA,0x50,0xFE,0x71,0x47);

2004 version:
MIDL_DEFINE_GUID(IID, IID_IAcadApplication,0x93bc4e71,0xafe7,0x4aa7,0xbc,0x07,0xf8,0x0a,0xcd,0xb6,0x72,0xd5);

I'm not a COM expert and I can't figure out how is it possible that IID_IAcadApplication is from 2004 OARX version. All paths are set to 2007 OARX.
I have tryed manually change this identifier through the VS IDE and everything worked fine.
I have 2005, 2007, 2008 AutoCAD installed on my computer.
Any ideas?

Re: QueryInterface() problem

Anonymous — Thu, 10 May 2007 09:19:31 GMT

My mistake.. forgot to increment type library index from 16 to 17:

// Import AutoCAD COM interfaces
#import "acax17enu.tlb" raw_interfaces_only no_namespace

Re: QueryInterface() problem

Anonymous — Thu, 10 May 2007 14:06:22 GMT

We're currently using same source code to build ARX app with ARX2004 and ARX2007. How would you suggest to manage version indices in this situation? Maybe there is a ObjectARX define for the version? Something like this:

#if ACAD_VERSION = 16
#import "acax16enu.tlb" raw_interfaces_only no_namespace
#elseif ACAD_VERSION = 17
#import "acax17enu.tlb" raw_interfaces_only no_namespace
#endif

Re: QueryInterface() problem

Anonymous — Thu, 10 May 2007 16:34:11 GMT

You have to do exactly as you suggest. 🙂
--
Owen Wengerd
President, ManuSoft ==> http://www.manusoft.com
VP Americas, CADLock, Inc. ==> http://www.cadlock.com

wrote in message news:5581522@discussion.autodesk.com...
We're currently using same source code to build ARX app with ARX2004 and
ARX2007. How would you suggest to manage version indices in this situation?
Maybe there is a ObjectARX define for the version? Something like this:

#if ACAD_VERSION = 16
#import "acax16enu.tlb" raw_interfaces_only no_namespace
#elseif ACAD_VERSION = 17
#import "acax17enu.tlb" raw_interfaces_only no_namespace
#endif

Re: QueryInterface() problem

Anonymous — Fri, 11 May 2007 06:22:32 GMT

The only thing is ObjectARX doesn't provide version define (ACAD_VERSION). As I understand I have to define it somewhere else myself? As I am using different visual c++ project configurations for 2004 and 2007 ObjectARX builds, the only solution I see is preprocessor definitions for different versions. Am I right?

Re: QueryInterface() problem

Anonymous — Fri, 11 May 2007 12:39:47 GMT

Yes, that is exactly what you have to do. I recommend to use the
preprocessor symbol _ACADTARGET set to 15/16/17 for the different versions
of the ObjectARX SDK. 🙂
--
Owen Wengerd
President, ManuSoft ==> http://www.manusoft.com
VP Americas, CADLock, Inc. ==> http://www.cadlock.com

wrote in message news:5582729@discussion.autodesk.com...
The only thing is ObjectARX doesn't provide version define (ACAD_VERSION).
As I understand I have to define it somewhere else myself? As I am using
different visual c++ project configurations for 2004 and 2007 ObjectARX
builds, the only solution I see is preprocessor definitions for different
versions. Am I right?