Sample Script Object

    struct ExampleObj : NPScriptObjStd<ExampleObj> {
        static NPScriptClass<ExampleObj> klass;

        ExampleObj(NPP npp, NPClass *aClass)
         : NPScriptObjStd(npp, aClass)
        {
            registerMethod("example", &ExampleObj::example);
        }
        virtual ExampleObj* self() { return this; }
        static const char* s_className() { return "[ExampleObj]"; }

        virtual bool example(NPIdentifier, const NPVariant *args, uint32_t argCount, NPVariant *result) {
            return true; }
    };

Windows: Export DLL entrypoints with Example.def

Because the npapi headers, the normal __dllexport method is unavailable. Export at least the following three entrypoints:

    LIBRARY "npExample"

    EXPORTS
        NP_GetEntryPoints   @1
        NP_Initialize       @2
        NP_Shutdown         @3

Windows: Resource File

Must have a VERSIONINFO block:

    VS_VERSION_INFO VERSIONINFO
    FILEVERSION 1,0,0,0
    PRODUCTVERSION 1,0,0,0
    FILEFLAGSMASK 0x17L
    #ifdef _DEBUG
    FILEFLAGS 0x1L
    #else
    FILEFLAGS 0x0L
    #endif
    FILEOS 0x40000L
    FILETYPE 0x2L
    FILESUBTYPE 0x0L
    BEGIN
        BLOCK "StringFileInfo"
        BEGIN
            BLOCK "040904E4"
            BEGIN
                VALUE "CompanyName", "npExample Company"
                VALUE "FileVersion", "1.0.1"
                VALUE "InternalName", "npExample.dll"
                VALUE "LegalCopyright", "Copyright (C) 2012"
                VALUE "ProductName", "npExample"
                VALUE "ProductVersion", "1.0.1"
                VALUE "MIMEType", "application/x-npExampleMimetype"
            END
        END
        BLOCK "VarFileInfo"
        BEGIN
            VALUE "Translation", 0x409, 1200
        END
    END