Unresolved extern "dwTlsIndex" exported function in dll

[ForNow]

Hi I have a c DLL. the Dllmain and the exported function(s) are in different source files. Since the exported function need the value of the variable dwTlsindex. I decalre as an extern I both define it and declare it in DllMain

extern DWORD dwTlsIndex;
static DWORD dwTlsIndex;
BOOL APIENTRY DllMain( HMODULE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)

in the exported function the following is the definition I know I have used the extern storage specifier with out any problem many times maybe there is something different because this is a DLL as the linker cant resolve dwTlsIndex

#else

 \_\_declspec(dllexport) void opendata(char \*);

#endif

 extern DWORD dwTlsIndex;

 void opendata(char \*filename)
 {
	 typedef void \*(DLL\_FN)(char \*);

[CPallini]

Quote:

extern DWORD dwTlsIndex; static DWORD dwTlsIndex;

You should just write

DWORD dwTlsIndex;

because:

• You don't need the extern declaration in the file that defines the variable.
• The static keyword makes the variable having file-scope (link failure).

[ForNow]

Tried it still getting unresolved maybe something I have to do in my project

[ForNow]

thanks