Unresolved external symbol

Hi! I'm trying to use the imaging library APIs but, when I try to create:

::CoCreateInstance(CLSID_ImagingFactory, NULL, CLSCTX_INPROC_SERVER, IID_IImagingFactory, (void **)&pFactory);

I get:

Error 2 error LNK2019: unresolved external symbol IID_IImagingFactory referenced in function "public: virtual void __cdecl ImageLoader::run(void)" (?run@ImageLoader@@UAAXXZ) imageloader.obj SCD

I tried to include as well:

#include <initguid.h>
#include <imgguids.h>

but I got a multiple definition. Is there any other way of defining those symbols?
Thanks!

Goto your project properties goto c++ then code generation change the runtime library to multi threaded MT.

See if that helps.

Make sure you're linking the actual library. (#includes are only useful to the compiler; the linker doesn't care about them.)

I already told the linker where to find imaging.lib. Is there anything else I should link?
Thanks!

Quote:

---

Originally Posted by Luc484

Hi! I'm trying to use the imaging library APIs but, when I try to create:

::CoCreateInstance(CLSID_ImagingFactory, NULL, CLSCTX_INPROC_SERVER, IID_IImagingFactory, (void **)&pFactory);

I get:

Error 2 error LNK2019: unresolved external symbol IID_IImagingFactory referenced in function "public: virtual void __cdecl ImageLoader::run(void)" (?run@ImageLoader@@UAAXXZ) imageloader.obj SCD

I tried to include as well:

#include <initguid.h>
#include <imgguids.h>

but I got a multiple definition. Is there any other way of defining those symbols?
Thanks!

---

Did you do the includes in a .h of .cpp file..Try putting the includes in a .cpp file

This is working! Thanks!

Quote:

---

Originally Posted by sunil_cguru

Did you do the includes in a .h of .cpp file..Try putting the includes in a .cpp file

---

If it was an includes problem if wouldn't have compiled.

it would compile..but multiple definitions would get flagged by the linker