access static variables/functions in a statically linked library from a dynamic dll

I am trying to use static class variables and functions in a dynamically loaded dll, which are subclasses of the original class. These static members are used in a statically linked class; this class loads the dlls using a factory,开发者_如何学Python and these dlls should have access to the static functions and variables. Here is a short example as a simple demonstration (i.e., don't expect it to compile; the actual classes have over 1000 lines each):

//GenericBase.h-------------------------
#include "GenericDll.h"
class GenericBase{
public:
   GenericBase()
   {
      mClassA.addInstance(this);
   }
   static int mNumInstances;
   static void DoSomething();
   static void Foo();
   static void LoadDlls();
   set<GenericDll*> mPlugins;
};
//--------------------------------------

//GenericDll.h--------------------------
class GenericDll : public GenericBase
{
    void Function();
};
extern "C" __declspec (dllexport) GenericDll* CreateModule()
{
    GenericDll * module = new GenericDll();
    return module;
}
//--------------------------------------

//GenericBase.cpp-----------------------
void GenericBase::DoSomething()
{
    for (it = mPlugins.begin(); it != mPlugins.end(); it++)
        it->Function();
}
//--------------------------------------

//GenericDll.cpp------------------------
void GenericDll::Function()
{
    mNumInstances++; // mNumInstancesin GenericDll and mNumInstances in
                    // the static linked GenericBase have different
                    // addresses
    cout << &mNumInstances<<endl;

    Foo();          // again, the address Foo() is different in the dll
}
//--------------------------------------

//main.cpp
int main(){
    GenericBase g;
    GenericBase::LoadDlls(); //not shown
    GenericBase::DoSomething();
    cout << &mNumInstances << endl;
}

//Output: these are the addresses of the mNumInstances
>> 00FAC3B0
>> 0F753398
>> 004D3398

So, the overall question or goal is: how can I make the address of mNumInstances the same for the statically linked object, and the dynamically loaded dll classes that subclass this object?

Hopefully this is clear enough, and makes sense!

---

To achieve what you wanted to do, you would need to make the shared (copied per DLL) static library a DLL itself.

Think of a DLL as more like an EXE.

Also, be very careful with library versions and compiler and linker settings when returning things like set<> (what ever it is) as things like alignment, data type sizes and different library implementations (inc debug to release) can mean runtime errors (crashes if you are lucky).