C visual studio undeclared identifier for define

Hello i have the following code..

#define VB_CHAR     signed char
#define V开发者_高级运维B_UCHAR    unsigned char

#if defined(VBISAM_NO_CISAM_CONFLICT)
    #include "vbisam_rename.h"
#endif

#include    "vbdecimal.h"

vbdecimal doesnt include any other header but fails to see it

Error 1 error C2065: 'VB_CHAR' : undeclared identifier c:\users\parhs\documents\visual studio 2010\projects\testdll4\vbdecimal.h

I have to define VB_CHAR in vbdecimal in order to work..

Any work-around for this?

Well. It could be that vbisam_rename.h '#undefs' VB_CHAR.