Solved

unresolved external symbol CLSID_DirectDraw

Posted on 1998-04-23
6
1,299 Views
Last Modified: 2013-12-03
Here's the code:

...
<include ddraw.h>
...
void Test()
{
    HRESULT hr;
    HINSTANCE hinst;
    FARPROC dgco;
    IClassFactory*pcf;
   
    hinst=LoadLibrary("ddraw.dll");
    if (hinst) {
   
        dgco=GetProcAddress(hinst,"DllGetClassObject");

        hr=( (HRESULT(WINAPI*)(REFCLSID,REFIID,IClassFactory**)) dgco)
             (CLSID_DirectDraw,
              IID_IClassFactory,
              &pcf);
       
        if (S_OK==hr) {
          AfxMessageBox("OK");
          pcf->Release();
        }

        FreeLibrary(hinst);
    }
}

It compiles OK, but at link time, I get the following error:

error LNK2001: unresolved external symbol _CLSID_DirectDraw

Linking with ddraw.lib does not help.

CLSID_DirectDraw is declared in ddraw.h:

#if defined( _WIN32 ) && !defined( _NO_COM )
DEFINE_GUID( CLSID_DirectDraw,                  0xD7B70EE0,0x4340,0x11CF,0xB0,0x63,0x00,0x20,0xAF,0xC2,0xCD,0x35 );
DEFINE_GUID( CLSID_DirectDrawClipper,           0x593817A0,0x7DB3,0x11CF,0xA2,0xDE,0x00,0xAA,0x00,0xb9,0x33,0x56 );
DEFINE_GUID( IID_IDirectDraw,                  0x6C14DB80,0xA733,0x11CE,0xA5,0x21,0x00,0x20,0xAF,0x0B,0xE5,0x60 );
DEFINE_GUID( IID_IDirectDraw2,                  0xB3A6F3E0,0x2B43,0x11CF,0xA2,0xDE,0x00,0xAA,0x00,0xB9,0x33,0x56 );
DEFINE_GUID( IID_IDirectDrawSurface,            0x6C14DB81,0xA733,0x11CE,0xA5,0x21,0x00,0x20,0xAF,0x0B,0xE5,0x60 );
DEFINE_GUID( IID_IDirectDrawSurface2,            0x57805885,0x6eec,0x11cf,0x94,0x41,0xa8,0x23,0x03,0xc1,0x0e,0x27 );

DEFINE_GUID( IID_IDirectDrawPalette,            0x6C14DB84,0xA733,0x11CE,0xA5,0x21,0x00,0x20,0xAF,0x0B,0xE5,0x60 );
DEFINE_GUID( IID_IDirectDrawClipper,            0x6C14DB85,0xA733,0x11CE,0xA5,0x21,0x00,0x20,0xAF,0x0B,0xE5,0x60 );
                 
#endif

Why do I get the unresolved external symbol error ?
0
Comment
Question by:byang
  • 3
  • 2
6 Comments
 
LVL 7

Expert Comment

by:galkin
ID: 1397002
Include ddraw.lib into your project
0
 
LVL 23

Expert Comment

by:chensu
ID: 1397003
Since you are linking ddraw.dll dynamically (why do you want to do so?), I think you shouldn't link ddraw.lib.

Either

#define INITGUID
#include <objbase.h>
#include <ddraw.h>

or

#include <objbase.h>
#include <initguid.h>
#include <ddraw.h>

0
 
LVL 3

Author Comment

by:byang
ID: 1397004
galkin: I tried linking with ddraw.lib, and still got the same error. This is mentioned in my question and I'm afraid you missed it.

chensu: I'm experiementing to see if I can manually obtain usable interface pointers thru DllGetClassObject(), without going thru SCM. I think as long as I pay attention to threading models, it should work. I'll try your INITGUID define. Since my test program is MFC, I assume all the necessary headers are included already.

Also, please don't answer this question for now. MS developer support news emailed on April 21 contains this link about unresolved CLSID/IID in internet client SDK, which might answer my question. I'll check it first.

http://support.microsoft.com/support/kb/articles/Q182/1/17.asp
0
What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

 
LVL 23

Expert Comment

by:chensu
ID: 1397005
When #include <initguid.h> is used after #include <objbase.h>, DEFINE_GUID will define the GUID instead of declaring it.

The KB article does not apply to your case.
0
 
LVL 3

Author Comment

by:byang
ID: 1397006
You're right, DEFINE_GUID has 2 expansions, depending on if INITGUID is defined.

Answer the question and I'll accept it.
0
 
LVL 23

Accepted Solution

by:
chensu earned 70 total points
ID: 1397007
Thank you.
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Query performance - SQL Server 20 82
Need example 5 115
Changing the installation path of this MSI 5 103
Strange - Deleted Resource Info appears in Azure Portal 6 90
As more and more people are shifting to the latest .Net frameworks, the windows presentation framework is gaining importance by the day. Many people are now turning to WPF controls to provide a rich user experience. I have been using WPF controls fo…
A theme is a collection of property settings that allow you to define the look of pages and controls, and then apply the look consistently across pages in an application. Themes can be made up of a set of elements: skins, style sheets, images, and o…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…

810 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question