_usrdll

shamjs · 11-24-2011, 11:13 PM

Hi All,
i want to know what's the meaning of #ifdef _USRDLL
(i think it is related to MFC but not sure)

here is my code

Code:

/*******predictor.cpp*****/
#ifdef _USRDLL
#include "../../dir1/inc/comm.h"
Comm gPipe;
#endif

.
.//here i have my pgm code

when i execute the pgm compiler is reporting error as
predictor.cpp:26: error: âgPipeâ was not declared in this scope

this error is due to failure of condition of #ifdef _USRDLL

plz guide me how to overcome this error.......

waiting for your reply........

tronayne · 11-26-2011, 09:27 AM

You might want to try

Code:

#if defined(_WIN32)
#if (defined(_USRDLL))
.
.
.

and make sure you're including appropriate header files.

Also see http://en.wikipedia.org/wiki/Microso..._Class_Library and, possibly, the Further Reading and External Links sections of the article.

Hope this helps some.

shamjs · 11-27-2011, 10:49 PM

is there any equivalent for #ifdef _USRDLL in g++ compiler so that i can use it