c++ - Read and change global std::map in executable through injected dll -

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I have some function hooks installed in implementing DLL. In the Executive is the Global Study :: Map variable, which 

  std :: map & lt; Int, int & gt; Has been declared as. G_lenMap;

I know its address is from disassembly. I need to insert the key / value combination in this map (or somehow hook: search () function, which looks very different to me).

However, the most obvious way does not work: 

  std :: map & lt; Int, int & gt; * G_lenMap; G_lenMap = (std :: map & lt; int, int & gt; *) 0x4D7480; Int result = (* g_lenMap) [100];

This throws the "map / set iterator incompatible". I can easily read and change other global variables / structures, but not std :: map. What am I doing wrong?


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