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C++ Language question

When compiling my project I get this error message:
"[Linker Error] Undefined symbol _IID_IDirect3D referenced from C:\Data\Development\CBuilder\DDraw\MainUnit.Obj"

I'm quite new to C++ and I think I just forgot to link a library or header file.  So, which file do I need to link?  And how?

I can supply the source of MainUnit.h or MainUnit.cpp if necessary.
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Odie
Asked:
Odie
1 Solution
 
msmitsCommented:
You are using the IDirect3D OLE interface in your program. The IID_IDirect3D is the CLSID for this OLE interface. It is probably defined in some Direct3D header file or library file.
Please consult the Direct3D documentation for the correct files to include and link.

PS. you may delete the other question, because is looks identical to this one.
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OdieAuthor Commented:
OK but I found the cause now (a INITGUID command that had to be at the beginning of the file).
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