object pointer differ between arx and dll

I have a dll that exports a method to read a document (of my type), and return the doucument's pointer to it's caller.

In my arx application, I call the method the have a document to be read. The strange thing is, the objects's pointers  of in the documen differ between  in the dll method and the in the arx after the method is called. (attatches show the difference.)

Any one can give me a hint? Thanks a lot!

Best Regards

yqxn

(Objectarx 2014, autoCAD2014, vs2012, build platform v100, x64)

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