Softimage SDK Programmer's Guide > Customizing Softimage using the SDK > Custom Commands >

# Exporting C++ Callbacks

For C++ commands, the wizard no longer generates DEF files. Instead, the __declspec(dllexport) keyword is used to export functions from the command DLL:

    XSIPLUGINCALLBACK CStatus XSILoadPlugin( PluginRegistrar& in_reg )
    {
    	...
    }

The XSIPLUGINCALLBACK macro is defined in sicppsdk.h:

    #ifndef XSIPLUGINCALLBACK
    	#ifdef unix
    		#define XSIPLUGINCALLBACK extern "C"
    	#else
    		// The Softimage C++ API uses C-linkage.  Disable the warning
    		// that reminds us that CStatus is a C++ object
    		#pragma warning( disable : 4190 )
    		#define XSIPLUGINCALLBACK extern "C" __declspec(dllexport)
    	#endif
    #endif