DLL and static variables member .

[WilliamGS]

Hi, I have a DLL with a exported class using AFX_EXT_CLASS, this class has static variables member, like:

//
// MyClass.h
//
class AFX_EXT_CLASS CMyClass {
static const WORD wIdDibActual;
static const char* pszDwgName;
....
};


//
// MyClass.cpp
//
#include "stdafx.h"
#include "MyClass.h"
const WORD Chc01Const::wIdDibActual = 1000;
const char* Chc01Const:szDwgName = "DWGNAME";

//
//
//

But, when I'm compiling the client app, it shows the error:

hcbloquefajaview.obj : error LNK2001: unresolved external symbol "public: static unsigned short const CMyClass ::wIdDibActual" (?wIdDibActual@Chc01Const@@2GB)
hcbloquefajaview.obj : error LNK2001: unresolved external symbol "public: static char const * const CMyClass :szDwgName" (?pszDwgName@Chc01Const@@2PBDB)
Debug/hcBloqueFaja.exe : fatal error LNK1120: 2 unresolved externals


How can I export/import static variables member in DLLs?

Thank you very much.

William G.S.

 

[CodingNovice]

Not sure you can. Remember that DLL's load into another processes address space and also must be reentrant.You can have statics in the host process that can be passed to a DLL but these will need careful concurrency control as your DLL should be reentrant.Although saying that I have only used DLL's for resources and exporting extern "C" funcs. I have never put a class inside a DLL so could be wrong.