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.NET Forum / Languages / Managed C++ / July 2005

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Linker Error

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Pravin Prabhu - 21 Jul 2005 12:03 GMT
Hi,
    I have a VC 6 project with a few C source code files,and one c++ source
file.  When I refer to any function in the c++ file from the C file, i get a
Linker error saying that "error LNK2001: unresolved external symbol
_AddPicture"  ( AddPicture) is the name of the function that i am referring
to. Function Protoypes and header files have been defined correctly.

Thanks and Regards
Jeff Partch [MVP] - 21 Jul 2005 12:59 GMT
> Hi,
>      I have a VC 6 project with a few C source code files,and one c++ source
> file.  When I refer to any function in the c++ file from the C file, i get a
> Linker error saying that "error LNK2001: unresolved external symbol
> _AddPicture"  ( AddPicture) is the name of the function that i am referring
> to. Function Protoypes and header files have been defined correctly.

Do you use EXTERN_C ?
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Jeff Partch [VC++ MVP]

Pravin Prabhu - 21 Jul 2005 13:10 GMT
No i am not using EXTERN_C, am i supposed to use it ? how...

thanks

> > Hi,
> >      I have a VC 6 project with a few C source code files,and one c++
[quoted text clipped - 7 lines]
>
> Do you use EXTERN_C ?
Jeff Partch [MVP] - 21 Jul 2005 13:28 GMT
> No i am not using EXTERN_C, am i supposed to use it ? how...

EXTERN_C VOID FuncForCppOrC(VOID);
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Jeff Partch [VC++ MVP]

Pravin Prabhu - 21 Jul 2005 13:36 GMT
Yes...It works now..Thanks Jeff

> > No i am not using EXTERN_C, am i supposed to use it ? how...
>
> EXTERN_C VOID FuncForCppOrC(VOID);

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