[CS5] Which of the argument of xSDKExport is correct?

Hi,

CS5r1 SDK with Premiere CS5 trial version

There are definition of the xSDKExport as follows.
Which is correct?

(a) Headers/PrSDKExport.h
typedef PREMPLUGENTRY (* ExportEntryFunc)(csSDK_int32 selector, exportStdParms *stdparms, void* param1, void* param2);

(b) Projects/SDK_Exporter/SDK_Exporter.cpp
DllExport PREMPLUGENTRY xSDKExport (
    int             selector,
    exportStdParms  *stdParmsP,
    long            param1,
    long            param2)

I seem that (a) is correct.
But, the xSDKExport of the plug-in is not called by host in the case of (a). (32bit/64bit both)

Regards,
Kengo Mikoshiba.