Re: #import not resolving correctly

From:

"NickP" <a@a.com>

Newsgroups:

microsoft.public.vc.language

Date:

Fri, 24 Aug 2007 11:49:57 +0100

Message-ID:

<u0sMZ3j5HHA.1484@TK2MSFTNGP06.phx.gbl>

my error message,

Error 1 error LNK2019: unresolved external symbol "long __cdecl
_com_dispatch_method(struct IDispatch *,long,unsigned short,unsigned
short,void *,wchar_t const *,...)"
(?_com_dispatch_method@@YAJPAUIDispatch@@JGGPAXPB_WZZ) referenced in
function "public: long __thiscall CDIntfEx::ICDIntfEx::PDFDriverInit(class
_bstr_t)" (?PDFDriverInit@ICDIntfEx@CDIntfEx@@QAEJV_bstr_t@@@Z)
DocumentPDFPrinter.obj

"NickP" <a@a.com> wrote in message
news:e17g1uj5HHA.5740@TK2MSFTNGP04.phx.gbl...

Hi there,

   I am importing a type library via a #import statement. All of the
interfaces appear correctly under it's own name space that I can view in
intellisense.

   I then create an instance of one of the classes and aquire it's
interface. This succeeds, but when I attempt to use the interface by
calling one of the methods I get an "Unresolved external symbol" LNK2001
error on that line.

   I thought that #import would give enough information to be able to
correctly resolve an external dependency? The file is a DLL and is
located within the Windows\System32 folder.

   How would I resolve this symbol?

   ....

   #import "c:\windows\system32\cdintf251.dll" named_guids
rename("CreateDC","CreateDC1")
rename("SetDefaultPrinter","SetDefaultPrinter1")

   ....

   ::CDIntfEx::ICDIntfEx* pPDFPrinter;
   if(S_OK==CoCreateInstance(::CDIntfEx::CLSID_CDIntfEx, NULL, CLSCTX_ALL,
__uuidof(pPDFPrinter), (void **)&pPDFPrinter))
   {
       BSTR pBStName = iName.AllocSysString();
       pPDFPrinter->PDFDriverInit(pBStName); << Unresolved
external symbol.
       SysFreeString(pBStName);
   }

   ....

   TIA.

Nick.