Dear all,
I am writting an application for windows mobile in VC++ 2005 and when I compile my program, I get error LNK2001: unresolved external symbol IID_IUPnPDeviceFinder
and
unresolved external symbol CLSID_UPnPDeviceFinder
I included the "upnp.h" from UPnPctrl part of the MS Server Components but I get that error.
I have also included the path to upnp.h in the project properties.
I noticed that there is no .lib file included in the /lib directory of UPnPctrl part. do you think that this must be a problem
Any help will be really appreciated. Thank you in advance.
PS. The error comes up when I use the CoCreateInstance(CLSID_UPnPDeviceFinder, NULL, CLSCTX, IID_UPnPDeviceFinder, (void **) &finder); to create an instance of IUPnPDeviceFinder.
UPnP (once more): linking problems
pappascd
Hi Dj_Riduh and thank you for your reply.
where exactly did u copy the files
upnp_i.c and ipnp_p.c are these your application files
Do you have any .lib files in your build path
Sorry for the large number of questions.
Thank you very much in advance.
Andre Odendaal
Great! Ah well, thanks for letting me know.
Do you know if I would be able to do this on this platform with the .NET framework I don't have any experience with .NET, but I'd give it a try if that was my only option (but I don't want to end up at a brickwall again!)
netweavernet
IxxI
Larry Surat
[...]\Visual Studio workspace\SmartHomeCtrl\SmartHomeCtrl
SmartHomeCtrl is my project name. All my .h and .cpp files are in this folder.
upnp_i.c and upnp_p.c are generated by Visual Studio.
There are no special .lib files in my build path.
#include "upnp.h" //should be enough.
I hope this helps. Feel free to ask more.
GuyVerachtert
kalahari_kudu
Thank you so much for your quick reply. Unfortunately though, I'm developing for Pocket PC 2003, and the cab file under the upnp directory won't install.
I have heard of programs that use UPnP running on this platform, so I'm hoping I just need a different install. I've been looking, but I really cannot find one anywhere.
Can I bother you for this (hopefully) last piece of the puzzle
roeeoz
I'm trying to create a PocketPC UPnP app, and I'm having the same problem. I've tried various suggestions with no success.
It doesn't look like UPnP.h uses the DEFINE_GUID macro that <initguid.h> defines - it explicitly declares them as extern's - so that doesn't help.
I can use __uuid to manually #define the IID's, but what do I do for the CLSID But why would UPnP.h define the IID's to be extern's and then not provide a way to link to them I did find a bunch of IID's in a library called uuid.lib, but not the UPnP ones. Was this an oversight on MS's part
student_programmer
OK, and I worked out that I can get the CLSID with __uuidof(UPnPDeviceFinder).
When I run CoCreateInstance though, I now get an HRESULT indicating 'Class not registered'. Do I have to install UPnP dll's or something (and if so, where are they) I can't find any Pocket PC-specific UPnP documentation, and I've never used COM on one of these devices before, so sorry if I'm being an idiot...
-A
wleizero
You need to include
#include <initguid.h>
before including upnp.h. Also keep in mind that this two includes should not go into stdafx.h, but rather into your .cpp file.
And alternative is to use a construct like __uuidof(UPnPDeviceFinder) instead of CLSID_UPnPDeviceFinder
Sabbadin
Hello 147cuore!
Try this:
IUPnPDeviceFinder *m_pUPnPDeviceFinder;
HRESULT hr;
hr = CoCreateInstance(CLSID_UPnPDeviceFinder,NULL,CLSCTX_SERVER,IID_IUPnPDeviceFinder,(LPVOID *)&m_pUPnPDeviceFinder);
if(hr!=S_OK) {
AfxMessageBox(_T("CoCreateInstance failed for device finder object"));
return FALSE;
}
m_pUPnPDeviceFinderCallback=new CUPnPDeviceFinderCallback();
m_pUPnPDeviceFinderCallback->AddRef();
[...]
I copied the upnp.h, upnp.idl, upnp_i.c, upnp_p.c and upnp_h.h files to my application dir and it works well...
Greetings,
DJ_Riduh